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20 Effective Math Strategies To Approach Problem-Solving
Katie Keeton
Math strategies for problem-solving help students use a range of approaches to solve many different types of problems. It involves identifying the problem and carrying out a plan of action to find the answer to mathematical problems.
Problem-solving skills are essential to math in the general classroom and real-life. They require logical reasoning and critical thinking skills. Students must be equipped with strategies to help them find solutions to problems.
This article explores mathematical problem solving strategies, logical reasoning and critical thinking skills to help learners with solving math word problems independently in real-life situations.
What are problem-solving strategies?
Problem-solving strategies in math are methods students can use to figure out solutions to math problems. Some problem-solving strategies:
- Draw a model
- Use different approaches
- Check the inverse to make sure the answer is correct
Students need to have a toolkit of math problem-solving strategies at their disposal to provide different ways to approach math problems. This makes it easier to find solutions and understand math better.
Strategies can help guide students to the solution when it is difficult ot know when to start.
The ultimate guide to problem solving techniques
Download these ready-to-go problem solving techniques that every student should know. Includes printable tasks for students including challenges, short explanations for teachers with questioning prompts.
20 Math Strategies For Problem-Solving
Different problem-solving math strategies are required for different parts of the problem. It is unlikely that students will use the same strategy to understand and solve the problem.
Here are 20 strategies to help students develop their problem-solving skills.
Strategies to understand the problem
Strategies that help students understand the problem before solving it helps ensure they understand:
- The context
- What the key information is
- How to form a plan to solve it
Following these steps leads students to the correct solution and makes the math word problem easier .
Here are five strategies to help students understand the content of the problem and identify key information.
1. Read the problem aloud
Read a word problem aloud to help understand it. Hearing the words engages auditory processing. This can make it easier to process and comprehend the context of the situation.
2. Highlight keywords
When keywords are highlighted in a word problem, it helps the student focus on the essential information needed to solve it. Some important keywords help determine which operation is needed. For example, if the word problem asks how many are left, the problem likely requires subtraction. Ensure students highlight the keywords carefully and do not highlight every number or keyword. There is likely irrelevant information in the word problem.
3. Summarize the information
Read the problem aloud, highlight the key information and then summarize the information. Students can do this in their heads or write down a quick summary. Summaries should include only the important information and be in simple terms that help contextualize the problem.
4. Determine the unknown
A common problem that students have when solving a word problem is misunderstanding what they are solving. Determine what the unknown information is before finding the answer. Often, a word problem contains a question where you can find the unknown information you need to solve. For example, in the question ‘How many apples are left?’ students need to find the number of apples left over.
5. Make a plan
Once students understand the context of the word problem, have dentified the important information and determined the unknown, they can make a plan to solve it. The plan will depend on the type of problem. Some problems involve more than one step to solve them as some require more than one answer. Encourage students to make a list of each step they need to take to solve the problem before getting started.
Strategies for solving the problem
1. draw a model or diagram.
Students may find it useful to draw a model, picture, diagram, or other visual aid to help with the problem solving process. It can help to visualize the problem to understand the relationships between the numbers in the problem. In turn, this helps students see the solution.
Similarly, you could draw a model to represent the objects in the problem:
2. Act it out
This particular strategy is applicable at any grade level but is especially helpful in math investigation in elementary school . It involves a physical demonstration or students acting out the problem using movements, concrete resources and math manipulatives . When students act out a problem, they can visualize and contectualize the word problem in another way and secure an understanding of the math concepts. The examples below show how 1st-grade students could “act out” an addition and subtraction problem:
The problem | How to act out the problem |
Gia has 6 apples. Jordan has 3 apples. How many apples do they have altogether? | Two students use counters to represent the apples. One student has 6 counters and the other student takes 3. Then, they can combine their “apples” and count the total. |
Michael has 7 pencils. He gives 2 pencils to Sarah. How many pencils does Michael have now? | One student (“Michael”) holds 7 pencils, the other (“Sarah”) holds 2 pencils. The student playing Michael gives 2 pencils to the student playing Sarah. Then the students count how many pencils Michael is left holding. |
3. Work backwards
Working backwards is a popular problem-solving strategy. It involves starting with a possible solution and deciding what steps to take to arrive at that solution. This strategy can be particularly helpful when students solve math word problems involving multiple steps. They can start at the end and think carefully about each step taken as opposed to jumping to the end of the problem and missing steps in between.
For example,
To solve this problem working backwards, start with the final condition, which is Sam’s grandmother’s age (71) and work backwards to find Sam’s age. Subtract 20 from the grandmother’s age, which is 71. Then, divide the result by 3 to get Sam’s age. 71 – 20 = 51 51 ÷ 3 = 17 Sam is 17 years old.
4. Write a number sentence
When faced with a word problem, encourage students to write a number sentence based on the information. This helps translate the information in the word problem into a math equation or expression, which is more easily solved. It is important to fully understand the context of the word problem and what students need to solve before writing an equation to represent it.
5. Use a formula
Specific formulas help solve many math problems. For example, if a problem asks students to find the area of a rug, they would use the area formula (area = length × width) to solve. Make sure students know the important mathematical formulas they will need in tests and real-life. It can help to display these around the classroom or, for those who need more support, on students’ desks.
Strategies for checking the solution
Once the problem is solved using an appropriate strategy, it is equally important to check the solution to ensure it is correct and makes sense.
There are many strategies to check the solution. The strategy for a specific problem is dependent on the problem type and math content involved.
Here are five strategies to help students check their solutions.
1. Use the Inverse Operation
For simpler problems, a quick and easy problem solving strategy is to use the inverse operation. For example, if the operation to solve a word problem is 56 ÷ 8 = 7 students can check the answer is correct by multiplying 8 × 7. As good practice, encourage students to use the inverse operation routinely to check their work.
2. Estimate to check for reasonableness
Once students reach an answer, they can use estimation or rounding to see if the answer is reasonable. Round each number in the equation to a number that’s close and easy to work with, usually a multiple of ten. For example, if the question was 216 ÷ 18 and the quotient was 12, students might round 216 to 200 and round 18 to 20. Then use mental math to solve 200 ÷ 20, which is 10. When the estimate is clear the two numbers are close. This means your answer is reasonable.
3. Plug-In Method
This method is particularly useful for algebraic equations. Specifically when working with variables. To use the plug-in method, students solve the problem as asked and arrive at an answer. They can then plug the answer into the original equation to see if it works. If it does, the answer is correct.
If students use the equation 20m+80=300 to solve this problem and find that m = 11, they can plug that value back into the equation to see if it is correct. 20m + 80 = 300 20 (11) + 80 = 300 220 + 80 = 300 300 = 300 ✓
4. Peer Review
Peer review is a great tool to use at any grade level as it promotes critical thinking and collaboration between students. The reviewers can look at the problem from a different view as they check to see if the problem was solved correctly. Problem solvers receive immediate feedback and the opportunity to discuss their thinking with their peers. This strategy is effective with mixed-ability partners or similar-ability partners. In mixed-ability groups, the partner with stronger skills provides guidance and support to the partner with weaker skills, while reinforcing their own understanding of the content and communication skills. If partners have comparable ability levels and problem-solving skills, they may find that they approach problems differently or have unique insights to offer each other about the problem-solving process.
5. Use a Calculator
A calculator can be introduced at any grade level but may be best for older students who already have a foundational understanding of basic math operations. Provide students with a calculator to allow them to check their solutions independently, accurately, and quickly. Since calculators are so readily available on smartphones and tablets, they allow students to develop practical skills that apply to real-world situations.
Step-by-step problem-solving processes for your classroom
In his book, How to Solve It , published in 1945, mathematician George Polya introduced a 4-step process to solve problems.
Polya’s 4 steps include:
- Understand the problem
- Devise a plan
- Carry out the plan
Today, in the style of George Polya, many problem-solving strategies use various acronyms and steps to help students recall.
Many teachers create posters and anchor charts of their chosen process to display in their classrooms. They can be implemented in any elementary, middle school or high school classroom.
Here are 5 problem-solving strategies to introduce to students and use in the classroom.
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Problem-solving
Educators can use many different strategies to teach problem-solving and help students develop and carry out a plan when solving math problems. Incorporate these math strategies into any math program and use them with a variety of math concepts, from whole numbers and fractions to algebra.
Teaching students how to choose and implement problem-solving strategies helps them develop mathematical reasoning skills and critical thinking they can apply to real-life problem-solving.
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There are many different strategies for problem-solving; Here are 5 problem-solving strategies: • draw a model • act it out • work backwards • write a number sentence • use a formula
Here are 10 strategies for problem-solving: • Read the problem aloud • Highlight keywords • Summarize the information • Determine the unknown • Make a plan • Draw a model • Act it out • Work backwards • Write a number sentence • Use a formula
1. Understand the problem 2. Devise a plan 3. Carry out the plan 4. Look back
Some strategies you can use to solve challenging math problems are: breaking the problem into smaller parts, using diagrams or models, applying logical reasoning, and trying different approaches.
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Using Mathematical Modeling to Get Real With Students
Unlike canned word problems, mathematical modeling plunges students into the messy complexities of real-world problem solving.
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How do you bring math to life for kids? Illustrating the boundless possibilities of mathematics can be difficult if students are only asked to examine hypothetical situations like divvying up a dessert equally or determining how many apples are left after sharing with friends, writes third- and fourth- grade teacher Matthew Kandel for Mathematics Teacher: Learning and Teaching PK-12 .
In the early years of instruction, it’s not uncommon for students to think they’re learning math for the sole purpose of being able to solve word problems or help fictional characters troubleshoot issues in their imaginary lives, Kandel says. “A word problem is a one-dimensional world,” he writes. “Everything is distilled down to the quantities of interest. To solve a word problem, students can pick out the numbers and decide on an operation.”
But through the use of mathematical modeling, students are plucked out of the hypothetical realm and plunged into the complexities of reality—presented with opportunities to help solve real-world problems with many variables by generating questions, making assumptions, learning and applying new skills, and ultimately arriving at an answer.
In Kandel’s classroom, this work begins with breaking students into small groups, providing them with an unsharpened pencil and a simple, guiding question: “How many times can a pencil be sharpened before it is too small to use?”
Setting the Stage for Inquiry
The process of tackling the pencil question is not unlike the scientific method. After defining a question to investigate, students begin to wonder and hypothesize—what information do we need to know?—in order to identify a course of action. This step is unique to mathematical modeling: Whereas a word problem is formulaic, leading students down a pre-existing path toward a solution, a modeling task is “free-range,” empowering students to use their individual perspectives to guide them as they progress through their investigation, Kandel says.
Modeling problems also have a number of variables, and students themselves have the agency to determine what to ignore and what to focus their attention on.
After inter-group discussions, students in Kandel’s classroom came to the conclusion that they’d need answers to a host of other questions to proceed with answering their initial inquiry:
- How much does the pencil sharpener remove?
- What is the length of a brand new, unsharpened pencil?
- Does the pencil sharpener remove the same amount of pencil each time it is used?
Introducing New Skills in Context
Once students have determined the first mathematical question they’d like to tackle (does the pencil sharpener remove the same amount of pencil each time it is used?), they are met with a roadblock. How were they to measure the pencil if the length did not fall conveniently on an inch or half inch? Kandel took the opportunity to introduce a new target skill which the class could begin using immediately: measuring to the nearest quarter inch.
“One group of students was not satisfied with the precision of measuring to the nearest quarter inch and asked to learn how to measure to the nearest eighth of an inch,” Kandel explains. “The attention and motivation exhibited by students is unrivaled by the traditional class in which the skill comes first, the problem second.”
Students reached a consensus and settled on taking six measurements total: the initial length of the new, unsharpened pencil as well as the lengths of the pencil after each of five sharpenings. To ensure all students can practice their newly acquired skill, Kandel tells the class that “all group members must share responsibility, taking turns measuring and checking the measurements of others.”
Next, each group created a simple chart to record their measurements, then plotted their data as a line graph—though exploring other data visualization techniques or engaging students in alternative followup activities would work as well.
“We paused for a quick lesson on the number line and the introduction of a new term—mixed numbers,” Kandel explains. “Armed with this new information, students had no trouble marking their y-axis in half- or quarter-inch increments.”
Sparking Mathematical Discussions
Mathematical modeling presents a multitude of opportunities for class-wide or small-group discussions, some which evolve into debates in which students state their hypotheses, then subsequently continue working to confirm or refute them.
Kandel’s students, for example, had a wide range of opinions when it came to answering the question of how small of a pencil would be deemed unusable. Eventually, the class agreed that once a pencil reached 1 ¼ inch, it could no longer be sharpened—though some students said they would be able to still write with it.
“This discussion helped us better understand what it means to make an assumption and how our assumptions affected our mathematical outcomes,” Kandel writes. Students then indicated the minimum size with a horizontal line across their respective graphs.
Many students independently recognized the final step of extending their line while looking at their graphs. With each of the six points representing their measurements, the points descended downward toward the newly added horizontal “line of inoperability.”
With mathematical modeling, Kandel says, there are no right answers, only models that are “more or less closely aligned with real-world observations.” Each group of students may come to a different conclusion, which can lead to a larger class discussion about accuracy. To prove their group had the most accurate conclusion, students needed to compare and contrast their methods as well as defend their final result.
Developing Your Own Mathematical Models
The pencil problem is a great starting point for introducing mathematical modeling and free-range problem solving to your students, but you can customize based on what you have available and the particular needs of each group of students.
Depending on the type of pencil sharpener you have, for example, students can determine what constitutes a “fair test” and set the terms of their own inquiry.
Additionally, Kandel suggests putting scaffolds in place to allow students who are struggling with certain elements to participate: Simplified rulers can be provided for students who need accommodations; charts can be provided for students who struggle with data collection; graphs with prelabeled x- and y-axes can be prepared in advance.
.css-1sk4066:hover{background:#d1ecfa;} 7 Real-World Math Strategies
Students can also explore completely different free-range problem solving and real world applications for math . At North Agincourt Jr. Public School in Scarborough, Canada, kids in grades 1-6 learn to conduct water audits. By adding, subtracting, finding averages, and measuring liquids—like the flow rate of all the water foundations, toilets, and urinals—students measure the amount of water used in their school or home in a single day.
Or you can ask older students to bring in common household items—anything from a measuring cup to a recipe card—and identify three ways the item relates to math. At Woodrow Petty Elementary School in Taft, Texas, fifth-grade students display their chosen objects on the class’s “real-world math wall.” Even acting out restaurant scenarios can provide students with an opportunity to reinforce critical mathematical skills like addition and subtraction, while bolstering an understanding of decimals and percentages. At Suzhou Singapore International School in China, third- to fifth- graders role play with menus, ordering fictional meals and learning how to split the check when the bill arrives.
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- Problem-solving Models and Strategies
Have you ever been confronted with a challenging problem and had no idea how to even begin working on it? For instance, let's say you have two upcoming exams on the same day, and you are unsure how to prepare for them. Or, let's say you are solving a complex math problem, but you are stuck and don't know how to proceed. In these moments, problem-solving strategies and models can help us tackle difficult problems by guiding us with well-known approaches or plans to follow.
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Jump to a key chapter
In this article, we explore problem-solving strategies and models that can be applied to solve problems. Then, we practice applying these models in some example exercises.
Problem-solving strategies and model descriptions
Oftentimes in mathematics, there is more than one way to solve a problem. Using problem-solving strategies can help you approach problems in a structured and logical manner to improve your efficiency.
Problem-solving strategies are models based on previous experience that provide a recommended approach for solving problems or analyzing potential solutions.
Problem-solving strategies involve steps like understanding, planning, and organizing, for example. While problem-solving strategies cannot guarantee an easier solution to a problem, they do provide techniques and tools that act as a guide for success.
Types of problem-solving models and strategies
Many models and strategies are developed based on the nature of the problem at hand. In this article, we discuss two well-known models that are designed to address various types of problems, including:
Polya's f our-step problem-solving model
IDEAL problem-solving model
Let's look at these two models in detail.
A mathematician named George Polya developed a model called the Polya f our-step problem-solving model to approach and solve various kinds of problems. This method has the following steps:
Understand the problem
Devise a plan, carry out the plan.
John Bransford and Barry Stein also proposed a five-step model named IDEAL to resolve a problem with a sound and methodical approach. The IDEAL model is based on the following steps:
- Identify The Problem
- Define An Outcome
- Explore Possible Strategies
- Anticipate Outcomes & Act
- Look And Learn
Using either of these two models to help you identify and approach problems methodically can help make it easier to solve them.
Polya's four-step problem-solving model
Polya's f our-step problem-solving model can be used to solve day-to-day problems as well as mathematical and other academic problems. As seen briefly, the steps of this problem-solving model include: understanding the problem, creating and carrying out a plan, and looking back. Let's look at these steps in more detail to understand how they are used.
This is a critical initial step. Simply put, if you don't fully understand the problem, you won't be able to identify a solution. You can understand a problem better by reviewing all of the inputs and available information, including its conditions and circumstances. Reading and understanding the problem helps you to organize the information as well as assign the relevant variables.
The following techniques can be applied during this problem-solving step:
Read the problem out loud to process it better.
List or summarize the important information to find out what is given and what is still missing.
Sketch a detailed diagram as a visual aid, depending on the problem.
Visualize a scenario about the problem to put it into context.
Use keyword analysis to identify the necessary operations (i.e., pay attention to important words and phrases such as "how many," "times," or "total").
Now that you have taken the time to properly understand the problem, you can devise a plan on how to proceed further to solve it. During this second step, you identify what strategy to follow to arrive at a solution. When considering a strategy to use, it's important to consider exactly what it is that you want to know.
Some problem-solving strategies include:
Identify the pattern from the given information and use it.
Use the guess-and-check method.
Work backward by using potential answers.
Apply a specific formula for the problem.
Eliminate the possibilities that don't work out.
Solve a simpler version of the problem first.
Form an equation and solve it.
During this third step, you solve the problem by applying your chosen strategy. For example, if you planned to solve the problem by drawing a graph, then during this step, you draw the graph using the information gathered in the previous steps. Here, you test your problem-solving skills and find if the solution works or not.
Below are some points to keep in mind when solving the problem:
Be systematic in your approach when implementing a strategy.
Check the work and see whether the solution works in all relevant cases.
Be flexible and change the strategy if necessary.
Keep solving and don't give up.
At this fourth step, you check your solution. This can be done by solving the problem in another way or simply by confirming that your solution makes sense. This step helps you decide if any improvements are needed for your solution. You may choose to check after solving an individual problem or after solving an entire set. Checking the problem carefully also helps you to reflect on the process and improve your methods for future problem solving.
The IDEAL problem-solving model was developed by Bransford and Stein as a guide for understanding and solving problems. This method is used in both education and industry. The IDEAL problem-solving model consists of five steps: identifying the problem, describing the outcome, exploring the possible strategies, anticipating the outcome, and looking back to learn. Let us explore these steps in detail by considering them one by one.
I dentify the problem - In this first step, you identify and understand the problem. To do this, you evaluate which information is provided and available, and you identify the unknown variables and missing information.
D escribe the outcome - In this second step, you define the result you are seeking. This matters because a problem might have multiple potential results, so you need to clarify which outcomes in particular you are aiming for. Defining an outcome clarifies the path that must be taken to solving the problem.
E xplore possible strategies - Now that you have considered the desired outcome, you are ready to brainstorm and explore different strategies and techniques to solve your particular problem.
A nticipate outcomes and act - From the previous step, you already have explored different strategies and techniques. During this step, you review and evaluate them in order to choose the best one to act on. Your selection should consider the benefits and drawbacks of the strategy and whether it can ultimately lead to the desired outcome. After making your selection, you act on it and apply the technique to the given problem.
L ook and learn - The final step to solving problems with this method is to consider whether the applied technique worked and if the needed results were obtained. Also, an additional step is learning from the current problem and its methods to make problem solving more efficient in the future.
Examples of problem-solving models and strategies
Here are some solved examples of the problem-solving models and strategies discussed above.
Find the number when two times the sum of \(3\) and that number is thrice that number plus \(4\). Solve this problem with Polya's f our-step problem-solving model .
Solution: We will follow the steps of Polya's f our-step problem-solving model as mentioned above to find the number.
Step 1 : Understand the problem.
By reading and understanding the question, we denote the unknown number as \(x\).
Step 2 : Devise a plan.
We see that two times \(x\) is added to \(3\) to make it equal to thrice the \(x\) plus \(4\). So, we can determine that forming an equation to solve the mathematical problem is a reasonable plan. Therefore, we form an equation by going step by step:
First we add \(x\) with \(3\) and multiply it with \(2\).
\begin{equation}\tag{1}\Rightarrow 2(x+3)\end{equation}
Then, we form the second part of the equation for thrice the \(x\) plus \(4\).
\begin{equation}\tag{2}\Rightarrow 3x+4\end{equation}
Hence, equating both sides \((1)\) and \((2)\) we get,
\[2(x+3)=3x+4\]
Step 3 : Carry out the plan.
Now, we algebraically solve the equation above.
\begin{align}2(x+3) &=3x+4 \\2x+6 &= 3x+4 \\3x-2x &= 6-4 \\x &=2\end{align}
Step 4 : Look back.
By inputting the value of 2 in our equation, we see that two times \(2+3\) is \(10\) and three times \(2\) plus \(4\) is also 10. Hence, the left side and right side are equal. So, our solution is satisfied.
Hence, the number is \(2\).
A string is \(48 cm\) long. It is cut into two pieces such that one piece is three times that of the other piece. What is the length of each piece?
Solution : Let us work on this problem using the IDEAL problem-solving method.
Step 1 : Identify the problem.
We are given a length of a string, and we know that it is cut into two parts, whereby one part is three times longer than the other. As the length of the longer piece of string is dependent on the shorter string, we assume only one variable, say \(x\).
Step 2 : Describe the outcome.
From the problem, we understand that we need to find the length of each piece of string. And we need the results such that the total length of both the pieces should be \(48 cm\).
Step 3 : Explore possible strategies.
There are multiple ways to solve this problem. One way to solve it is by using the trial-and-error method. Also, as one length is dependent on another, the other way is to form an equation to solve for the unknown variable algebraically.
Step 4 : Anticipate outcomes and act.
From the above step, we have two methods by which we can solve the given problem. Let's find out which method is more efficient and solve the problem by applying it.
For the trial-and-error method, we need to assume value(s) one at a time for the variable and then solve for it individually until we get the total of 48.
That is, suppose we consider \(x=1\).
Then, by the condition, the second piece is three times the first piece.
\[\Rightarrow 3x=3(1)=3\]
Then the length of both pieces should be:
\[\Rightarrow 1+3=4\neq 48\]
Hence, our assumption is wrong. So, we need to consider another value. For this method, we continue this process until we find the total of \(48\). We can see that proceeding this way is time-consuming. So, let us apply the other method instead.
In this method, we form an equation and solve it to obtain the unknown variable's value. We know that one piece is three times the other piece. Therefore, let the length of one piece be \(x\). Then the length of the other piece is \(3x\).
Now, as the string is \(48 cm\) long, it should be considered as a sum of both of its pieces.
\begin{align}&\Rightarrow x+3x=48 \\&\Rightarrow 4x=48 \\&\Rightarrow x=\frac{48}{4} \\&\Rightarrow x=12 \\\end{align}
So, the length of one piece is \(12cm\). The length of the other piece is \(3x=3(12)=36cm\).
Step 5: Look and learn
Let's take a look to see if our answers are correct. The unknown variable value we obtained is \(12\). Using it to find the other piece we get a value of \(36\). Now, adding both of them, we get:
\[\Rightarrow 12+36=48\].
Here, we got the correct total length. Hence, our calculations and applied method are right.
Problem-solving strategies and models - Key takeaways
- Problem-solving strategies are models developed based on previous experience that provide a recommended approach for analyzing potential solutions for problems.
- Two common models include Polya's Four-Step Problem-Solving Model and the IDEAL problem-solving model.
- Polya's Four-Step Problem-Solving Model has the following steps: 1) Understand the problem, 2) Devise a plan, 3) Carry out the plan, and 4) Looking back.
- The IDEAL model is based on the following steps: 1) Identify The Problem, 2) Define An Outcome, 3) Explore Possible Strategies, 4) Anticipate Outcomes and Act, 5) Look And Learn.
Flashcards in Problem-solving Models and Strategies 13
Step 01: What do you know?
- Mrs. Grave gives 1 penny on Day 1, 2 pennies on Day 2, and 4 pennies on Day 3.
- Each day the amount of money will double.
- Paul does his tasks for 5 days.
Step 02: What do you want to know?
You curious to figure out how much money will Paul have in total after 5 days of doing his tasks. We want to solve the problem by formulating a simpler one.
Step 01: What does David know?
- The number of players starting the tournament:8
- Only winners can advance to the next round
Step 02: What does David want to know?
David wants to compare the number of players in the second round to the number that starts the tournament. To solve the problem, David can use a diagram.
Step 01: What do you know?
- Slices of tomatoes and cucumber were used.
- The total number of slices used is 60.
- The ratio of cucumbers to tomatoes is 4:6
- The ratio simplifies to 2:3
Step 02: What do you want to know?
We need to know the number of both cucumber and tomato slices. We want to solve the problem by doing a table.
24 cucumber slices and 36 tomato slices is one solution
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Frequently Asked Questions about Problem-solving Models and Strategies
What are problem-solving models?
Problem-solving models are models developed based on previous experience that provide a recommended approach for solving problems or analyzing potential solutions.
What are types of problem-solving?
The most basic types of problem-solving are Polya's four-step problem-solving model and the IDEAL problem-solving model.
What are the strategies to problem-solve efficiently?
The strategies to solve a problem efficiently are to understand it, determine the correct method, solve it and verify and learn from it.
What are the lists of problem-solving models in algebra?
In algebra, any problem can be solved using Polya's four-step problem-solving model and IDEAL problem-solving model.
What are the 5 problem-solving strategies?
The 5 problem-solving strategies are 1. Identify The Problem, 2. Define An Outcome, 3. Explore Possible Strategies, 4. Anticipate Outcomes & Act, 5. Look And Learn.
Test your knowledge with multiple choice flashcards
Step 01: What do you know? Mrs. Grave gives 1 penny on Day 1, 2 pennies on Day 2, and 4 pennies on Day 3.Each day the amount of money will double. Paul does his tasks for 5 days.Step 02: What do you want to know?You curious to figure out how much money will Paul have in total after 5 days of doing his tasks. We want to solve the problem by formulating a simpler one.
Step 01: What does David know? The number of players starting the tournament:8 Only winners can advance to the next roundStep 02: What does David want to know?David wants to compare the number of players in the second round to the number that starts the tournament. To solve the problem, David can use a diagram.
Step 01: What do you know?Slices of tomatoes and cucumber were used.The total number of slices used is 60.The ratio of cucumbers to tomatoes is 4:6The ratio simplifies to 2:3Step 02: What do you want to know? We need to know the number of both cucumber and tomato slices. We want to solve the problem by doing a table.
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The Frayer Model for Math
ThoughtCo. / Deb Russell
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The Frayer Model is a graphic organizer that was traditionally used for language concepts, specifically to enhance the development of vocabulary. However, graphic organizers are great tools to support thinking through problems in math . When given a specific problem, we need to use the following process to guide our thinking which is usually a four-step process:
- What is being asked? Do I understand the question?
- What strategies might I use?
- How will I solve the problem?
- What is my answer? How do I know? Did I fully answer the question?
Learning to Use the Frayer Model in Math
These 4 steps are then applied to the Frayer model template ( print the PDF ) to guide the problem-solving process and develop an effective way of thinking. When the graphic organizer is used consistently and frequently, over time, there will be a definite improvement in the process of solving problems in math. Students who were afraid to take risks will develop confidence in approaching the solving of math problems.
Let's take a very basic problem to show what the thinking process would be for using the Frayer Model.
Sample Problem and Solution
A clown was carrying a bunch of balloons. The wind came along and blew away 7 of them and now he only has 9 balloons left. How many balloons did the clown begin with?
Using the Frayer Model to Solve the Problem:
- Understand : I need to find out how many balloons the clown had before the wind blew them away.
- Plan: I could draw a picture of how many balloons he has and how many balloons the wind blew away.
- Solve: The drawing would show all of the balloons, the child may also come up with the number sentence as well.
- Check : Re-read the question and put the answer in written format.
Although this problem is a basic problem, the unknown is at the beginning of the problem which often stumps young learners. As learners become comfortable with using a graphic organizer like a 4 block method or the Frayer Model which is modified for math, the ultimate result is improved problem-solving skills. The Frayer Model also follows the steps to solving problems in math.
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- 2 Times Tables Fact Worksheets
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Problem Analysis in Math: Using the 5-Step Problem-Solving Approach
This blog will explore the ways in which problem analysis of student mathematics difficulties can be applied within a problem-solving approach. We will review the core principles of a multi-tier system of support (MTSS) framework, identify the steps within a problem-solving approach, and explore the ways in which problem analysis helps to inform intervention development within the context of mathematics instruction.
Core Principles of an MTSS Framework
A variety of definitions of an MTSS framework exist within the field of education; however, several common principles are apparent and have helped to shape much of the work within this area. The National Association of State Directors of Special Education (Batsche et al., 2006) define eight core principles that capture some of the most important aspects and core beliefs of an MTSS framework:
- We can effectively teach all children.
- Intervene early.
- Use a multi-tier model of service delivery.
- Use a problem-solving model to make decisions within a multi-tier model.
- Use scientific, research-based validated intervention and instruction to the extent available.
- Monitor student progress to inform instruction.
- Use data to make decisions.
- Use assessment for screening, diagnostics, and progress monitoring.
The fourth core principle refers to utilizing a problem-solving model to make decisions. More specifically, educators and administrators should use a clearly defined problem-solving process that guides their team in identifying the problem, analyzing the size and effect of the problem, developing a plan for intervention to address the problem, implementing the plan, and examining the effectiveness of the intervention plan.
5-Step Problem-Solving Approach
The problem-solving approach utilized by the FastBridge Learning ® system includes the following five steps:
Problem identification
- Problem analysis
- Plan development
- Plan implementation
- Plan evaluation
Following this 5-step problem-solving approach helps to guide school teams of educators and administrators in engaging in data-based decision making: a core principle of the MTSS framework.
The first step in this problem-solving approach is problem identification. Christ and Arañas (2014) define a problem as a discrepancy between observed and expected performance. Regularly scheduled universal screening plays an important role in problem identification. The FastBridge Learning ® system offers a variety of screening measures for mathematics, which are summarized in the table below. While the results of regularly scheduled universal screening help to inform whether or not a discrepancy between observed and expected performance exists, problem analysis aims to identify the size and effects of the problem.
Problem Analysis
After a problem has been identified, the problem must be defined through the method of problem analysis. Only after a problem has been sufficiently analyzed and defined, can the significance of a problem be understood (Brown-Chidsey & Bickford, 2016). Problem analysis can occur at both the individual level and the group level.
Problem Analysis at the Individual Leve l
At the individual level, a discrepancy between observed and expected performance may appear within an individual’s universal screening results. FastBridge Learning ® Individual Skills Reports can provide detailed information to support problem analysis. The Individual Skills Report provides a snapshot of a given student’s risk, relative to benchmark goals, and also provides detailed results on an item-by-item basis. This item-by-item analysis provides insight into the skills the student demonstrates and which skills may require additional instructional support.
If the student’s performance is relatively close to the benchmark goal, the problem is likely to be understood as a minor problem. Item-by-item analysis can help a teacher determine if targeted reteaching of specific content may help the student to reach the goal, or if more intensive intervention may be necessary. An example of a FastBridge Learning ® Individual Skills Report for the earlyMath subtest Numeral Identification (Kindergarten) may be seen below.
The above report suggests that the sample student is at “some risk” for difficulty with numeral identification. It also reveals that the student was able to identify the given numerals with 91% accuracy. Additionally, the item-by-item analysis indicates that the student struggled to identify the following numerals: 12, 14, and 19. In this case, problem analysis may suggest that this is a minor problem, which may be remedied through targeted reteaching of the numerals 12, 14, and 19. In contrast, if during problem analysis, an Individual Skills Report for Numeral Identification indicated very low accuracy and a substantial number of misidentified numerals, the results would suggest a more significant problem. Significant problems warrant planning for more intensive intervention.
Problem analysis at the group level
At the group level, problem analysis seeks to determine the size and effects of a problem at the class, grade, or school-wide level. FastBridge Learning ® Group Screening Reports and Group Skills Reports help to provide insight about groups of students at risk for learning difficulties. An example of a Group Screening Report for earlyMath may be seen below.
The Group Screening Report pictured above indicates that approximately 77% of Ms. Horst’s kindergarten class scored at or above the benchmark goal on the earlyMath Composite during the fall benchmark period, while 6% and 18% were identified as being at “some risk” and “high risk” respectively.
All students should demonstrate growth in math achievement throughout the school year. If there are students who met the fall benchmark for mathematics, but not the winter and/or spring benchmarks, problem analysis must occur. In Ms. Horst’s class, we can see by the spring benchmark period, only 12% of her kindergarten class scored at or above the benchmark goal on the earlyMath composite, while 18% and 71% were identified as being at “some risk” and “high risk” respectively.
Problem analysis at the group level may aim to answer questions such as the following:
- What type of mathematics instruction was provided for these students?
- Did other kindergarten classrooms within the school experience a similar pattern of mathematics difficulty?
- With which specific mathematics skills (e.g., decomposing, number sequencing, numeral identification) did the group demonstrate success and difficulty?
- How close to the end-of-year mathematics goals are the students now?
In order to complete a thorough problem analysis, supplemental data about student performance and instructional practices may need to be collected.
For instance, classroom observations and/or a teacher interview would provide insight into the first question. Group Screening Reports for the other kindergarten classrooms in the school could help identify if this is a schoolwide pattern of difficulty or a classroom-specific pattern of difficulty. An analysis of the Group Skills Report for Ms. Horst’s class would provide insight into students’ strengths and weaknesses across the earlyMath Composite’s subtests. Additional, targeted, follow-up assessment using selected FastBridge Learning ® earlyMath subtests could help to gather information about the final question.
The goal of problem analysis is to determine the significance of a problem and to develop a hypothesis about why a problem has occurred. The information gathered during the problem analysis stage is then used to inform the third step of the 5-step problem-solving approach: plan development.
Batsche, G., Elliott, J., Graden, J. L., Grimes, J., Kovaleski, J. F., Prasse, D., Schrag, J., & Tilly, W.D. (2006). Response to intervention: Policy considerations and implementation. Alexandria, VA: National Association of State Directors of Special Education, Inc.
Brown-Chidsey, R. and Bickford, R. (2016). Practical handbook of multi-tiered systems of support: Building academic and behavioral success in schools. New York, NY: The Guilford Press.
Christ, T.J., & Arañas, Y.A. (2014). Best practices in problem analysis. In A. Thomas & J. Grimes (Eds.), Best Practices in School Psychology VI . Bethesda, MD: National Association of School Psychologists.
Math Problem Solving Strategies
In these lessons, we will learn some math problem solving strategies for example, Verbal Model (or Logical Reasoning), Algebraic Model, Block Model (or Singapore Math), Guess & Check Model and Find a Pattern Model.
Related Pages Solving Word Problems Using Block Models Heuristic Approach to Problem-Solving Algebra Lessons
Problem Solving Strategies
The strategies used in solving word problems:
- What do you know?
- What do you need to know?
- Draw a diagram/picture
Solution Strategies Label Variables Verbal Model or Logical Reasoning Algebraic Model - Translate Verbal Model to Algebraic Model Solve and Check.
Solving Word Problems
Step 1: Identify (What is being asked?) Step 2: Strategize Step 3: Write the equation(s) Step 4: Answer the question Step 5: Check
Problem Solving Strategy: Guess And Check
Using the guess and check problem solving strategy to help solve math word problems.
Example: Jamie spent $40 for an outfit. She paid for the items using $10, $5 and $1 bills. If she gave the clerk 10 bills in all, how many of each bill did she use?
Problem Solving : Make A Table And Look For A Pattern
- Identify - What is the question?
- Plan - What strategy will I use to solve the problem?
- Solve - Carry out your plan.
- Verify - Does my answer make sense?
Example: Marcus ran a lemonade stand for 5 days. On the first day, he made $5. Every day after that he made $2 more than the previous day. How much money did Marcus made in all after 5 days?
Find A Pattern Model (Intermediate)
In this lesson, we will look at some intermediate examples of Find a Pattern method of problem-solving strategy.
Example: The figure shows a series of rectangles where each rectangle is bounded by 10 dots. a) How many dots are required for 7 rectangles? b) If the figure has 73 dots, how many rectangles would there be?
Rectangles | Pattern | Total dots |
1 | 10 | 10 |
2 | 10 + 7 | 17 |
3 | 10 + 14 | 24 |
4 | 10 + 21 | 31 |
5 | 10 + 28 | 38 |
6 | 10 + 35 | 45 |
7 | 10 + 42 | 52 |
8 | 10 + 49 | 59 |
9 | 10 + 56 | 66 |
10 | 10 + 63 | 73 |
a) The number of dots required for 7 rectangles is 52.
b) If the figure has 73 dots, there would be 10 rectangles.
Example: Each triangle in the figure below has 3 dots. Study the pattern and find the number of dots for 7 layers of triangles.
Layers | Pattern | Total dots |
1 | 3 | 3 |
2 | 3 + 3 | 6 |
3 | 3 + 3 + 4 | 10 |
4 | 3 + 3 + 4 + 5 | 15 |
5 | 3 + 3 + 4 + 5 + 6 | 21 |
6 | 3 + 3 + 4 + 5 + 6 + 7 | 28 |
7 | 3 + 3 + 4 + 5 + 6 + 7 + 8 | 36 |
The number of dots for 7 layers of triangles is 36.
Example: The table below shows numbers placed into groups I, II, III, IV, V and VI. In which groups would the following numbers belong? a) 25 b) 46 c) 269
I | 1 | 7 | 13 | 19 | 25 |
II | 2 | 8 | 14 | 20 | 26 |
III | 3 | 9 | 15 | 21 | 27 |
IV | 4 | 10 | 16 | 22 | |
V | 5 | 11 | 17 | 23 | |
VI | 6 | 12 | 18 | 24 |
Solution: The pattern is: The remainder when the number is divided by 6 determines the group. a) 25 ÷ 6 = 4 remainder 1 (Group I) b) 46 ÷ 6 = 7 remainder 4 (Group IV) c) 269 ÷ 6 = 44 remainder 5 (Group V)
Example: The following figures were formed using matchsticks.
a) Based on the above series of figures, complete the table below.
Number of squares | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Number of triangles | 4 | 6 | 8 | 10 | ||||
Number of matchsticks | 12 | 19 | 26 | 33 |
b) How many triangles are there if the figure in the series has 9 squares?
c) How many matchsticks would be used in the figure in the series with 11 squares?
Number of squares | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Number of triangles | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
Number of matchsticks | 12 | 19 | 26 | 33 | 40 | 47 | 54 | 61 |
b) The pattern is +2 for each additional square. 18 + 2 = 20 If the figure in the series has 9 squares, there would be 20 triangles.
c) The pattern is + 7 for each additional square 61 + (3 x 7) = 82 If the figure in the series has 11 squares, there would be 82 matchsticks.
Example: Seven ex-schoolmates had a gathering. Each one of them shook hands with all others once. How many handshakes were there?
A | B | C | D | E | F | G | |
A | |||||||
B | ● | ||||||
C | ● | ● | |||||
D | ● | ● | ● | ||||
E | ● | ● | ● | ● | |||
F | ● | ● | ● | ● | ● | ||
G | ● | ● | ● | ● | ● | ● | |
HS | 6 | 5 | 4 | 3 | 2 | 1 |
Total = 6 + 5 + 4 + 3 + 2 + 1 = 21 handshakes.
The following video shows more examples of using problem solving strategies and models. Question 1: Approximate your average speed given some information Question 2: The table shows the number of seats in each of the first four rows in an auditorium. The remaining ten rows follow the same pattern. Find the number of seats in the last row. Question 3: You are hanging three pictures in the wall of your home that is 16 feet wide. The width of your pictures are 2, 3 and 4 feet. You want space between your pictures to be the same and the space to the left and right to be 6 inches more than between the pictures. How would you place the pictures?
The following are some other examples of problem solving strategies.
Explore it/Act it/Try it (EAT) Method (Basic) Explore it/Act it/Try it (EAT) Method (Intermediate) Explore it/Act it/Try it (EAT) Method (Advanced)
Finding A Pattern (Basic) Finding A Pattern (Intermediate) Finding A Pattern (Advanced)
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Maneuvering the Middle
Student-Centered Math Lessons
Math Problem Solving Strategies
How many times have you been teaching a concept that students are feeling confident in, only for them to completely shut down when faced with a word problem? For me, the answer is too many to count. Word problems require problem solving strategies. And more than anything, word problems require decoding, eliminating extra information, and opportunities for students to solve for something that the question is not asking for . There are so many places for students to make errors! Let’s talk about some problem solving strategies that can help guide and encourage students!
1. C.U.B.E.S.
C.U.B.E.S stands for circle the important numbers, underline the question, box the words that are keywords, eliminate extra information, and solve by showing work.
- Why I like it: Gives students a very specific ‘what to do.’
- Why I don’t like it: With all of the annotating of the problem, I’m not sure that students are actually reading the problem. None of the steps emphasize reading the problem but maybe that is a given.
2. R.U.N.S.
R.U.N.S. stands for read the problem, underline the question, name the problem type, and write a strategy sentence.
- Why I like it: Students are forced to think about what type of problem it is (factoring, division, etc) and then come up with a plan to solve it using a strategy sentence. This is a great strategy to teach when you are tackling various types of problems.
- Why I don’t like it: Though I love the opportunity for students to write in math, writing a strategy statement for every problem can eat up a lot of time.
3. U.P.S. CHECK
U.P.S. Check stands for understand, plan, solve, and check.
- Why I like it: I love that there is a check step in this problem solving strategy. Students having to defend the reasonableness of their answer is essential for students’ number sense.
- Why I don’t like it: It can be a little vague and doesn’t give concrete ‘what to dos.’ Checking that students completed the ‘understand’ step can be hard to see.
4. Maneuvering the Middle Strategy AKA K.N.O.W.S.
Here is the strategy that I adopted a few years ago. It doesn’t have a name yet nor an acronym, (so can it even be considered a strategy…?)
UPDATE: IT DOES HAVE A NAME! Thanks to our lovely readers, Wendi and Natalie!
- Know: This will help students find the important information.
- Need to Know: This will force students to reread the question and write down what they are trying to solve for.
- Organize: I think this would be a great place for teachers to emphasize drawing a model or picture.
- Work: Students show their calculations here.
- Solution: This is where students will ask themselves if the answer is reasonable and whether it answered the question.
Ideas for Promoting Showing Your Work
- White boards are a helpful resource that make (extra) writing engaging!
- Celebrating when students show their work. Create a bulletin board that says ***I showed my work*** with student exemplars.
- Take a picture that shows your expectation for how work should look and post it on the board like Marissa did here.
Show Work Digitally
Many teachers are facing how to have students show their work or their problem solving strategy when tasked with submitting work online. Platforms like Kami make this possible. Go Formative has a feature where students can use their mouse to “draw” their work.
If you want to spend your energy teaching student problem solving instead of writing and finding math problems, look no further than our All Access membership . Click the button to learn more.
Students who plan succeed at a higher rate than students who do not plan. Do you have a go to problem solving strategy that you teach your students?
Editor’s Note: Maneuvering the Middle has been publishing blog posts for nearly 8 years! This post was originally published in September of 2017. It has been revamped for relevancy and accuracy.
Problem Solving Posters (Represent It! Bulletin Board)
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Reader Interactions
18 comments.
October 4, 2017 at 7:55 pm
As a reading specialist, I love your strategy. It’s flexible, “portable” for any problem, and DOES get kids to read and understand the problem by 1) summarizing what they know and 2) asking a question for what they don’t yet know — two key comprehension strategies! How about: “Make a Plan for the Problem”? That’s the core of your rationale for using it, and I bet you’re already saying this all the time in class. Kids will get it even more because it’s a statement, not an acronym to remember. This is coming to my reading class tomorrow with word problems — thank you!
October 4, 2017 at 8:59 pm
Hi Nora! I have never thought about this as a reading strategy, genius! Please let me know how it goes. I would love to hear more!
December 15, 2017 at 7:57 am
Hi! I am a middle school teacher in New York state and my district is “gung ho” on CUBES. I completely agree with you that kids are not really reading the problem when using CUBES and only circling and boxing stuff then “doing something” with it without regard for whether or not they are doing the right thing (just a shot in the dark!). I have adopted what I call a “no fear word problems” procedure because several of my students told me they are scared of word problems and I thought, “let’s take the scary out of it then by figuring out how to dissect it and attack it! Our class strategy is nearly identical to your strategy:
1. Pre-Read the problem (do so at your normal reading speed just so you basically know what it says) 2. Active Read: Make a short list of: DK (what I Definitely Know), TK (what I Think I Know and should do), and WK (what I Want to Know– what is the question?) 3. Draw and Solve 4. State the answer in a complete sentence.
This procedure keep kids for “surfacely” reading and just trying something that doesn’t make sense with the context and implications of the word problem. I adapted some of it from Harvey Silver strategies (from Strategic Teacher) and incorporated the “Read-Draw-Write” component of the Eureka Math program. One thing that Harvey Silver says is, “Unlike other problems in math, word problems combine quantitative problem solving with inferential reading, and this combination can bring out the impulsive side in students.” (The Strategic Teacher, page 90, Silver, et al.; 2007). I found that CUBES perpetuates the impulsive side of middle school students, especially when the math seems particularly difficult. Math word problems are packed full of words and every word means something to about the intent and the mathematics in the problem, especially in middle school and high school. Reading has to be done both at the literal and inferential levels to actually correctly determine what needs to be done and execute the proper mathematics. So far this method is going really well with my students and they are experiencing higher levels of confidence and greater success in solving.
October 5, 2017 at 6:27 am
Hi! Another teacher and I came up with a strategy we call RUBY a few years ago. We modeled this very closely after close reading strategies that are language arts department was using, but tailored it to math. R-Read the problem (I tell kids to do this without a pencil in hand otherwise they are tempted to start underlining and circling before they read) U-Underline key words and circle important numbers B-Box the questions (I always have student’s box their answer so we figured this was a way for them to relate the question and answer) Y-You ask yourself: Did you answer the question? Does your answer make sense (mathematically)
I have anchor charts that we have made for classrooms and interactive notebooks if you would like them let me me know….
October 5, 2017 at 9:46 am
Great idea! Thanks so much for sharing with our readers!
October 8, 2017 at 6:51 pm
LOVE this idea! Will definitely use it this year! Thank you!
December 18, 2019 at 7:48 am
I would love an anchor chart for RUBY
October 15, 2017 at 11:05 am
I will definitely use this concept in my Pre-Algebra classes this year; I especially like the graphic organizer to help students organize their thought process in solving the problems too.
April 20, 2018 at 7:36 am
I love the process you’ve come up with, and think it definitely balances the benefits of simplicity and thoroughness. At the risk of sounding nitpicky, I want to point out that the examples you provide are all ‘processes’ rather than strategies. For the most part, they are all based on the Polya’s, the Hungarian mathematician, 4-step approach to problem solving (Understand/Plan/Solve/Reflect). It’s a process because it defines the steps we take to approach any word problem without getting into the specific mathematical ‘strategy’ we will use to solve it. Step 2 of the process is where they choose the best strategy (guess and check, draw a picture, make a table, etc) for the given problem. We should start by teaching the strategies one at a time by choosing problems that fit that strategy. Eventually, once they have added multiple strategies to their toolkit, we can present them with problems and let them choose the right strategy.
June 22, 2018 at 12:19 pm
That’s brilliant! Thank you for sharing!
May 31, 2018 at 12:15 pm
Mrs. Brack is setting up her second Christmas tree. Her tree consists of 30% red and 70% gold ornaments. If there are 40 red ornaments, then how many ornaments are on the tree? What is the answer to this question?
June 22, 2018 at 10:46 am
Whoops! I guess the answer would not result in a whole number (133.333…) Thanks for catching that error.
July 28, 2018 at 6:53 pm
I used to teach elementary math and now I run my own learning center, and we teach a lot of middle school math. The strategy you outlined sounds a little like the strategy I use, called KFCS (like the fast-food restaurant). K stands for “What do I know,” F stands for “What do I need to Find,” C stands for “Come up with a plan” [which includes 2 parts: the operation (+, -, x, and /) and the problem-solving strategy], and lastly, the S stands for “solve the problem” (which includes all the work that is involved in solving the problem and the answer statement). I find the same struggles with being consistent with modeling clearly all of the parts of the strategy as well, but I’ve found that the more the student practices the strategy, the more intrinsic it becomes for them; of course, it takes a lot more for those students who struggle with understanding word problems. I did create a worksheet to make it easier for the students to follow the steps as well. If you’d like a copy, please let me know, and I will be glad to send it.
February 3, 2019 at 3:56 pm
This is a supportive and encouraging site. Several of the comments and post are spot on! Especially, the “What I like/don’t like” comparisons.
March 7, 2019 at 6:59 am
Have you named your unnamed strategy yet? I’ve been using this strategy for years. I think you should call it K.N.O.W.S. K – Know N – Need OW – (Organise) Plan and Work S – Solution
September 2, 2019 at 11:18 am
Going off of your idea, Natalie, how about the following?
K now N eed to find out O rganize (a plan – may involve a picture, a graphic organizer…) W ork S ee if you’re right (does it make sense, is the math done correctly…)
I love the K & N steps…so much more tangible than just “Read” or even “Understand,” as I’ve been seeing is most common in the processes I’ve been researching. I like separating the “Work” and “See” steps. I feel like just “Solve” May lead to forgetting the checking step.
March 16, 2020 at 4:44 pm
I’m doing this one. Love it. Thank you!!
September 17, 2019 at 7:14 am
Hi, I wanted to tell you how amazing and kind you are to share with all of us. I especially like your word problem graphic organizer that you created yourself! I am adopting it this week. We have a meeting with all administrators to discuss algebra. I am going to share with all the people at the meeting.
I had filled out the paperwork for the number line. Is it supposed to go to my email address? Thank you again. I am going to read everything you ahve given to us. Have a wonderful Tuesday!
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What IS Problem-Solving?
Ask teachers about problem-solving strategies, and you’re opening a can of worms! Opinions about the “best” way to teach problem-solving are all over the board. And teachers will usually argue for their process quite passionately.
When I first started teaching math over 25 years ago, it was very common to teach “keywords” to help students determine the operation to use when solving a word problem. For example, if you see the word “total” in the problem, you always add. Rather than help students become better problem solvers, the use of keywords actually resulted in students who don’t even feel the need to read and understand the problem–just look for the keywords, pick out the numbers, and do the operation indicated by the keyword.
This post contains affiliate links, which simply means that when you use my link and purchase a product, I receive a small commission. There is no additional cost to you, and I only link to books and products that I personally use and recommend.
Another common strategy for teaching problem-solving is the use of acrostics that students can easily remember to perform the “steps” in problem-solving. CUBES is an example. Just as with keywords, however, students often follow the steps with little understanding. As an example, a common step is to underline or highlight the question. But if you ask students why they are underlining or highlighting the question, they often can’t tell you. The question is , in fact, super important, but they’ve not been told why. They’ve been told to underline the question, so they do.
The problem with both keywords and the rote-step strategies is that both methods try to turn something that is inherently messy into an algorithm! It’s way past time that we leave both methods behind.
First, we need to broaden the definition of problem-solving. Somewhere along the line, problem-solving became synonymous with “word problems.” In reality, it’s so much more. Every one of us solves dozens or hundreds of problems every single day, and most of us haven’t solved a word problem in years. Problem-solving is often described as figuring out what to do when you don’t know what to do. My power went out unexpectedly this morning, and I have work to do. That’s a problem that I had to solve. I had to think about what the problem was, what my options were, and formulate a plan to solve the problem. No keywords. No acrostics. I’m using my phone as a hotspot and hoping my laptop battery doesn’t run out. Problem solved. For now.
If you want to get back to what problem-solving really is, you should consult the work of George Polya. His book, How to Solve It , which was first published in 1945, outlined four principles for problem-solving. The four principles are: understand the problem, devise a plan, carry out the plan, and look back. This document from UC Berkeley’s Mathematics department is a great 4-page overview of Polya’s process. You can probably see that the keyword and rote-steps strategies were likely based on Polya’s method, but it really got out of hand. We need to help students think , not just follow steps.
I created both primary and intermediate posters based on Polya’s principles. Grab your copies for free here !
I would LOVE to hear your comments about problem-solving!
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Do you tutor teachers?
I do professional development for district and schools, and I have online courses.
You make a great point when you mentioned that teaching students to look for “keywords” is not teaching students to become better problem solvers. I was once guilty of using the CUBES strategy, but have since learned to provide students with opportunity to grapple with solving a problem and not providing them with specified steps to follow.
I think we’ve ALL been there! We learn and we do better. 🙂
Love this article and believe that we can do so much better as math teachers than just teaching key words! Do you have an editable version of this document? We are wanting to use something similar for our school, but would like to tweak it just a bit. Thank you!
I’m sorry, but because of the clip art and fonts I use, I am not able to provide an editable version.
Hi Donna! I am working on my dissertation that focuses on problem-solving. May I use your intermediate poster as a figure, giving credit to you in my citation with your permission, for my section on Polya’s Traditional Problem-Solving Steps? You laid out the process so succinctly with examples that my research could greatly benefit from this image. Thank you in advance!
Absolutely! Good luck with your dissertation!
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What Is a Bar Model? How to Use This Math Problem-Solving Method in Your Classroom
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Teaching mathematical problem-solving to your students is a crucial element of mathematical understanding. They must be able to decipher word problems and recognize the correct operation to use in order to solve the problem correctly (rather than freaking out as soon as they see a mathematical problem in words!!!). But what is the best strategy for embedding this knowledge into your students? Enter the Bar Model Method , also known in education as a tape diagram, strip diagram, or tape model.
The model has gained traction in classrooms around the world, so you may be thinking it’s time to introduce it in your classroom. But what is the bar model all about, and what are the advantages of using this method with elementary students? The math teachers on the Teach Starter team are here with a quick primer to help you decide if this is the right path for your math class!
Explore the latest math teaching resources from Teach Starter!
What Is a Bar Model?
The Bar Model is a mathematical diagram that is used to represent and solve problems involving quantities and their relationships to one another.
It was developed in Singapore in the 1980s when data showed Singapore’s elementary school students were lagging behind their peers in math. An analysis of testing data at the time showed less than half of Singapore’s students in grades 2-4 could solve word problems that were presented without keywords such as “altogether” or “left.” Something had to be done, and that something was the introduction of the bar model, which has been widely credited with rocketing the kids of Singapore to the top of math scores for kids all around the globe.
At its core, the bar model is an explicit teaching and learning strategy for problem-solving. The actual bar model consists of a set of bars or rectangles that represent the quantities in the problem, and the operations are represented by the lengths and arrangements of the bars. Among its strengths is the fact that it can be applied to all operations, including multiplication and division. They’re also useful when it comes to teaching students more advanced math concepts, such as ratios and proportionality.
The Bar Model combines the concrete (drawings) and the abstract (algorithms or equations) to help the student solve the problem.
How to Use a Bar Model in Math
Whether you’re calling it a bar model, a strip diagram, or a tape diagram, the concept is the same – you have rectangular bars (or strips) that are laid out horizontally to represent quantities and the relationships between them.
- The bars themselves — horizontal rectangles— represent the problem.
- The length of the bar(s) represents the quantity.
- The locations of the bars show the relationship between the quantities.
Visualizing this relationship helps students decide which operation to use to solve the problem. The student then labels the known quantities with numbers and labels the unknown quantities with question marks.
The three basic structures are:
- Part-Part-Whole
- Equal Parts
Many teachers (particularly in the elementary grades) will recognize elements of the Bar Model as being similar to the Part-Part-Whole method we’ve been teaching forever.
The Bar Model could be looked at as an extension of this concept. It can be used by students right through elementary school (and beyond) not only to solve addition and subtraction problems but to tackle multiplication and division word-based problems as well.
Teaching with the Bar Model
The Bar Model can easily be incorporated into your elementary math instruction, from simple addition to more complex multiplication and division and so on. Here are just a few ideas from our teacher team:
- Use part–whole bar models to show word problems with a missing number element to teach addition or subtraction.
- Use the bar model method to help students see how a bar must be cut into equal parts when multiplying and dividing.
- Help students visualize fractions with the bar model — Use the rectangles to help students see how the fractions relate to whole numbers by showing the relationship between the numerator and denominator.
Explore our complete collection of curriculum-aligned resources for teaching about operations !
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Introduction to Mathematical Modelling
Modelling Process
Modelling process #.
The modelling process provides a systematic approach to solving complex problems:
Clearly state the problem
Identify variables and parameters
Make assumptions and identify constraints
Build solutions
Analyze and assess
Report results
Check out Math Modeling: Getting Started and Getting Solutions to read more about the mathematical modelling process.
Problem Statement #
Modelling problems are open-ended: there are many different solutions, different levels of complexity, and different tools that can be applied. It’s a challenge even to know where to start! To begin the modelling process, we need to clearly state the problem so that we know what we are trying to solve.
Variables and Parameters #
Independent variables are quantities that are input into the system and dependent variables are the quantities that are output from the system and that we are trying to predict. We should be able to indentify the varaibles from a clearly articulated problem statement. Parameters are quantities that appear in the relationships between variables. We must list all variables and parameters in the system, give each a name and symbol and identify their dimensions such as length, mass and time.
Assumptions and Constraints #
Assumptions reduce the complexity of the model and also help define relationships between variables and parameters in the system. For example, we often assume that the force of gravity is constant for an object moving near the surface of the Earth. However we would not assume that the gravitational forces of celestial bodies are always constant. Constraints describe the values that our variables and parameters are allowed to take. For example, the mass of an object is always positive.
Build Solutions #
Once we have a clear problem statement and lists of variables, parameters, assumptions and constraints, then we need to decide what mathematical tools to use to construct the model. It should be clear from the context if our model is deterministic, stochastic, data-driven or perhaps a combination. Once we have decided on the kind of model to use, we apply all the tools available.
Analyze and Assess #
Just because we can find a solution, does not mean that this is a meaningful result. We need to interpret the solution to see if it makes sense given the context of the problem. We will want to ask ourselves:
Does the solution make sense in the context of the problem?
Does the solution answer our problem statement?
Are the results obtained reasonable and practical?
If it does not make sense, then we need to critically analyze the process. Perhaps there is an algebraic error in the solution, perhaps an input is incorrect, perhaps we made an incorrect assumption. Analyzing and assessing the solution can be a difficult and tedius process.
Report Results #
The last step is to then share the results of our modelling efforts. We need to construct a clear and concise report of the model and how we implemented the model in our work. This report is how we share our findings with our research community and make contributions to the research area.
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Explicitly Model Mathematics Concepts/Skills & Problem Solving Strategies
What is the purpose of explicitly modeling mathematics concepts/skills and problem solving strategies.
The purpose of explicitly modeling mathematics concepts/skills and problem solving strategies is twofold. First, explicit modeling of a target mathematics concept/skill provides students a clear and accessible format for initially acquiring an understanding of the mathematics concept/skill. Explicit modeling by you provides students with a clear, accurate, multi-sensory model of the skill or concept. Students must first be able to access the attributes of a concept/skill before they can be expected to understand it and be able to use it in meaningful ways. Explicit teacher modeling does just that. Second, by explicitly modeling effective strategies for approaching particular problem solving situations, you provide students a process for becoming independent learners and problem solvers. While peers can sometimes be effective models for students, students with special needs require a well qualified teacher to provide such modeling, at least in the initial phases of instruction.
What is Explicit Modeling?
Explicit modeling involves well-prepared teachers employing a variety of instructional techniques to illuminate the key attributes of any given mathematics concept/skill. In a sense, you serve as a "bridge of learning" for your student, an accessible bridge between the student and the particular mathematics concept/skill they are learning:
The level of teacher support you provide your students depends on how much of a learning bridge they need. In particular, students with learning problems need a well-established learning bridge (teacher model). They learn most effectively when their teacher provides clear and multi-sensory models of a mathematics concept/skill during math instruction.
What are some important considerations when implementing Explicit Modeling?
The teacher purposefully sets the stage for understanding by identifying what students will learn (visually and auditorily), providing opportunities for students to link what they already know (e.g. prerequisite concepts/skills they have already mastered, prior real-life experiences they have had, areas of interest based on your students' age, culture, ethnicity, etc.), and discussing with students how what they are going to learn has relevance/meaning for their immediate lives.
- Teacher breaks math concept/skill into learnable parts/steps. Think about the concept/skill and break it down into 3-4 features or parts.
- Teacher clearly describes features of the math concept or steps in performing math skill using visual examples.
- Teacher describes/models using multi-sensory techniques. Use as many "input" pathways as possible for any given concept/skill including auditory, visual, tactile, and kinesthetic means. For example, when modeling how to compare values of different fractions to determine "greater than," you might verbalize each step of the process for comparing fractions while pointing to each step written on chart paper (auditory and visual), represent each fraction using fraction circle pieces, running your finger around the perimeter of each piece, laying one fraction piece over the other one and running your finger along the space not covered up by the fraction of lesser value/area; "thinking aloud" by saying your thoughts aloud as you examine each fraction piece (visual, kinesthetic, auditory), verbalizing your answer and why you determined why one fraction was greater than the other, and having students run their fingers along the same fraction pieces and uncovered space (auditory, visual, tactile, kinesthetic).
- Teacher provides both examples and non-examples of the mathematics concept/skill. For example, in the above example, you might compare two different fractions using same process but place the fraction of greater value/area on top of the fraction of lesser value/area. Then prompt student thinking of why this is not an example of "greater than."
- Explicitly cue students to essential attributes of the mathematics concept/skill you model. For example, when associating the written fraction to the fraction pieces and their respective values, color code the numerator and denominator in ways that represent the meaning of the fraction pieces they use. Cue students to the color-coding and what each color represents. Then demonstrate how each written fraction relates to the "whole' circle:
2/4 = 2 of four equal pieces
- Teacher engages students in learning through demonstrating enthusiasm, through maintaining a lively pace, through periodically questioning students, and through checking for student understanding. Explicit modeling is not meant to be a passive learning experience for students. On the contrary, it is critical to involve students as you model.
- After modeling several examples and non-examples, begin to have your students demonstrate a few steps of the process.
- As students demonstrate greater understanding, ask them to complete more and more of the process.
- When students demonstrate complete understanding, have various students "teach" you by modeling the entire process.
- Play a game where you and your students try to "catch" each other making a mistake or leaving out a step in the process.
How do I implement Explicit Modeling?
- Select the appropriate level of understanding to model the concept/skill or problem solving strategy (concrete, representational, abstract).
- Ensure that your students have the prerequisite skills to perform the skill or use the problem solving strategy.
- Break down the concept/skill or problem solving strategy into logical and learnable parts (Ask yourself, "What do I do and what do I think as I perform the skill?"). The strategies you can link to from this site are already broken down into steps.
- Provide a meaningful context for the concept/skill or problem solving strategy (e.g. word or story problem suited to the age and interests of your students. Invite parents/family members of your students or members of the community who work in an area that can be meaningfully applied to the concept/skill or strategy and ask them to show how they use the concept/skill/strategy in their work.
- Provide visual, auditory, kinesthetic (movement), and tactile means for illustrating important aspects of the concept/skill (e.g. visually display word problem and equation, orally cue students by varying vocal intonations, point, circle, highlight computation signs or important information in story problems).
- "Think aloud" as you illustrate each feature or step of the concept/skill/strategy (e.g. say aloud what you are thinking as you problem-solve so students can better "visualize" the metacognitive aspects of understanding or doing the concept/skill/strategy).
- Link each step of the problem solving process (e.g. restate what you did in the previous step, what you are going to do in the next step, and why the next step is important to the previous step).
- Periodically check student understanding with questions, remodeling steps when there is confusion.
- Maintain a lively pace while being conscious of student information processing difficulties (e.g. need additional time to process questions).
- Model a concept/skill at least three times.
How does Explicitly Modeling Mathematics Concepts/Skills and Problem Solving Strategies help students who have learning problems?
- Teacher as model makes the concept/skill clear and learnable.
- High level of teacher support and direction enables student to make meaningful cognitive connections.
- Provides students who have attention problems, processing problems, memory retrieval problems, and metacognitive difficulties an accessible "learning map" to the concept/skill/strategy.
- Links between parts/steps are directly made, making confusion and misunderstanding less likely.
- Multi-sensory cueing provides students multiple modes to process and thereby learn information.
- Teaching students effective problem solving strategies provides them a means for solving problems independently and assists them to develop their metacognitive awareness.
What Mathematics Problem Solving Strategies can I teach my students?
Mathematics problem solving strategies that have research support or that have been field tested with students can be accessed by clicking on the link below. These strategies are organized according to mathematics concept/skill area. Each strategy is described and an example of how each strategy can be used is also provided.
What are additional resources I can use to help me implement Explicitly Modeling Mathematics Concepts/Skills and Problem Solving Strategies?
MathVIDS is an interactive CD-ROM/website for teachers who are teaching math to students who are having difficulty learning mathematics. The development of MathVIDS was sponsored through funding by the Virginia Department of Education.
Critical & Creative Thinking Resources: IDEAL problem solving
- Self evaluation
- Creating goals
- Creating personal mission statement
- Creative Thinking
- Problem Solving
- IDEAL problem solving
- CRITICAL THINKING
- Critical Thinking Tips
- Logic Terms
- Logic Traps
- Free OER Textbooks
- More Thinking: OER
- Ethics - OER Textbooks
- Evidence-Based Critical Thinking
- BELIEFS & BIAS
- Limits of Perception
- Reality & Assumptions
- Stereotypes & Race
- MAKING YOUR CASE
- Argument (OER)
- Inductive Arguments
- Information Literacy: Be Savvy about your Sources
- Persuasive Speaking (OER)
- Philosophy & Thinking
- WiPhi Philosophy Project
- Browse All Guides
VM: I had to inter-library loan this item to read the original content. This is highly cited throughout literature, so I wanted to have a good grasp on what it covered. Here are my notes and commentary:
- Full text From TNtech.edu: "Ideal Problem Solver, 2 ed." (c) 1984, 1993 more... less... Thanks to Center for Assessment & Improvement of Learning - Reports & Publications"
- Full text from ERIC: The IDEAL Workplace: Strategies for Improving Learning, Problem Solving, and Creativity
- Show your support: The Ideal Problem Solver: A Guide to Improving Thinking, Learning, and Creativity Second Edition
The reason you should learn the IDEAL method is so you don't need to avoid problems. The more know about and practice problem solving, the easier it gets. It is learnable skill. It also prompts you to look for problems and solutions instead of just doing things the same old way.
Improvement of problem solving skills.
Model for analyzing the processes that underlie effective problem solving.
IDEAL Model for improving problem solving (Verbatim copy of Fig 2.1; p.12)
I = Identifying the problem.
D = Define and represent the problem.
E = Explore possible strategies.
A = Act on the strategies.
L = Look back and evaluate the effects of your activities.
ELABORATION:
I = Identifying that there is a problem that, once described as a problem, may be solved or improved.
D = Define and represent the problem. Draw it instead of trying to imagine it.
E = Explore possible strategies & alternative approaches or viewpoints.
General strategies: Break problem down into small simple problems. Working a problem backwards. Build scale model Try simulation experiment, with smaller or simpler sets.
A = Act on the strategies. Try, then reflect or recall. Actively try learning strategy.
L = Look back and evaluate the effects of your activities. Look at results of learning strategy used: Does it work to allow full recall?
"Many students make the mistake of assuming that they have "learned" adequately if the information seems to make sense as they read it in a textbook or hear it in a lecture." (p. 23" Must use or practice, recall, or paraphrase - in order to evaluate effectiveness of learning.
Math: Do example problems before looking at solution to practice concepts. Look at solution to see where you went wrong (or not).
Don't let the test be the first time you evaluate your understanding of material
Problem identification and definition.
Proof of concept - act/look/evaluate.
To find an answer to a problem, you can dig deeper, or dig somewhere else.
Question assumptions about limits The old - think outside the box- strategy.
When memorizing, know what you need to remember Definitions? Concepts? Graphs? Dates? each teacher has different priorities...ask them what to focus on
Ways to solve problem of learning new information.
Techniques for improving memory.
Short term meomory
Long term memory
Remembering people's names
Studying for an essay test.
Using cues to retrieve information. For example, you can remember IDEAL first and that will help you reconstruct the idea of how to solve problems.
Some strategies for remembering information:
Make a story full of memorable images.
Funny obnoxious "vivid images" or "mental pictures" are more memorabl e. (Ex: random words in a list, passwords, people's names. Banana vomit haunts me.)
Rehearse over and over - over learn. (Ex: Memorizing a phone number 867-5309 )
Rehearse words in groups - chunking. (Ex: Memorizing a part in a play, poems, pledges, short stories.)
Organize words into conceptual categories - Look for unifying relationships. (Recall, order not important. Ex: Shopping list, points in an essay.)
Look for similarities and coincidences in the words themselves. (Ex: How many words have e's, or 2 syllables, or have pun-ishing homonyms)
The feet that use the manual transmission car pedals are, from left to right: C ( L eft-foot) utch , the B( R ight-foot) ake , and the A ccelerato ( R ight-foot)
Does order mimic alphabetical order? The manual transmission car pedals are, from left to right, the C lutch, the B rake, and the A ccelerator )
Use Acronyms I dentify D efine E xplore A ct L ook
Acronym- easily remembered word: FACE
Acrostic- easily remembered phrase: E very G ood B oy D eserves F udge
- Modified image source: Commons.wikimedia.org
Don't waste time studying what you already know
Image - Name Strategy:
What is unique about the person? What is unique about their name?
Find a relationship between the two.
Other Pairing Strategies:
method of loci: arranging words to be remembered in association with familiar location or path .
Peg-word method: arranging words to be remembered in association with number order or alphabet letter order .
Strategies to comprehend new information.
more difficult than
Strategies to memorize new information.
Learning with understanding - comprehending new information.
Knowledge of CORE CONCEPTS in a field SIMPLIFIES problem solving.
Ways to approach a problem of learning information that seems to be arbitrary:
Over-learn: rehearse the facts until they are mastered. 2+2=4
Find relationships between images or words that are memorable: story telling, silmilarieties, vivid images, pegging, etc.
When a concept seems unclear, learn more about it.
Memory- can be of seemingly arbitrary words or numbers: ROTE (Ex. Facts and relationships) appearance
Comprehension - is understanding significance or relationships or function
Novices often forced to memorize information until they learn enough (related concepts and context) to understand it.
The mere memorization of information rarely provides useful conceptual tools that enable one to solve new problems later on. (p. 61,69)
Taking notes will not necessarily lead to effective recall prompts. How do you know when you understand material? Self-test by trying to explain material to another person.That will expose gaps in understanding.
Recall answers or solve problems out of order to be sure you know which concepts to apply and why.
Look at mistakes made as soon as possible, and learn where you went wrong.
Uses of information require more or less precision in understanding, depending on context. (A pilot must know more about an airplane than a passenger.)
Evaluation basics: evaluate factual claims look for flaws in logic question assumptions that form the basis of the argument
Correlation does not necessarily prove cause and effect.
Importance of being able to criticize ideas and generate alternatives.
Strategies for effective criticism.
Strategies for formulating creative solutions.
Finding/understanding implicit assumptions that hamper brainstorming.
Strategies for making implicit assumptions explicit.
"The uncreative mind can spot wrong answers, but it takes a creative mnd to spot wrong questions ." Emphasis added. - Anthony Jay, (p.93)
Making implicit assumptions explicit: look for inconsistencies question assumptions make predictions analyze worst case get feedback & criticism from others
Increase generation of novel ideas: break down problem into smaller parts analyze properties on a simpler level use analogies use brainstorming give it a rest, sleep on it don't be in a hurry, let ideas incubate: talk to others, read, keep the problem in the back of your mind try to communicate your ideas as clearly as possible, preferably in writing. attempting to write or teach an idea can function as a discovery technique
Strategies for Effective Communication
What we are trying to accomplish (goal)
Evaluating communication fro effectiveness:
Identify and Define: Have you given audience basis to understand different points of view about a topic? Different problem definitions can lead to different solutions. Did you Explore pros and cons of different strategies? Did you take Action and then Look at consequences? Did you organize your content into main points that are easy to identify and remeber?
Did you use analogies and background information to put facts into context?
Did you make sure your facts were accurate and did you avoid making assumptions?Always check for logical fallacies and inconsistencies. Did you include information that is novel and useful, instead of just regurgitating what everyone already knows?
After you communicate, get feedback and evaluate your strategies. Look for effects, and learn from your mistakes. (p. 117)
Identify and Define what (problem) you want to communicate, with respect to your audience and your goals. Explore strategies for communicating your ideas.Act - based on your strategies. Look at effects.
Summaries of Useful Attitudes and Strategies: Anybody can use the IDEAL system to improve their problem solving skills.
Related Resources:
- Teaching The IDEAL Problem-Solving Method To Diverse Learners Written by: Amy Sippl
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ORIGINAL RESEARCH article
Mathematical problem-solving through cooperative learning—the importance of peer acceptance and friendships.
- 1 Department of Education, Uppsala University, Uppsala, Sweden
- 2 Department of Education, Culture and Communication, Malardalen University, Vasteras, Sweden
- 3 School of Natural Sciences, Technology and Environmental Studies, Sodertorn University, Huddinge, Sweden
- 4 Faculty of Education, Gothenburg University, Gothenburg, Sweden
Mathematical problem-solving constitutes an important area of mathematics instruction, and there is a need for research on instructional approaches supporting student learning in this area. This study aims to contribute to previous research by studying the effects of an instructional approach of cooperative learning on students’ mathematical problem-solving in heterogeneous classrooms in grade five, in which students with special needs are educated alongside with their peers. The intervention combined a cooperative learning approach with instruction in problem-solving strategies including mathematical models of multiplication/division, proportionality, and geometry. The teachers in the experimental group received training in cooperative learning and mathematical problem-solving, and implemented the intervention for 15 weeks. The teachers in the control group received training in mathematical problem-solving and provided instruction as they would usually. Students (269 in the intervention and 312 in the control group) participated in tests of mathematical problem-solving in the areas of multiplication/division, proportionality, and geometry before and after the intervention. The results revealed significant effects of the intervention on student performance in overall problem-solving and problem-solving in geometry. The students who received higher scores on social acceptance and friendships for the pre-test also received higher scores on the selected tests of mathematical problem-solving. Thus, the cooperative learning approach may lead to gains in mathematical problem-solving in heterogeneous classrooms, but social acceptance and friendships may also greatly impact students’ results.
Introduction
The research on instruction in mathematical problem-solving has progressed considerably during recent decades. Yet, there is still a need to advance our knowledge on how teachers can support their students in carrying out this complex activity ( Lester and Cai, 2016 ). Results from the Program for International Student Assessment (PISA) show that only 53% of students from the participating countries could solve problems requiring more than direct inference and using representations from different information sources ( OECD, 2019 ). In addition, OECD (2019) reported a large variation in achievement with regard to students’ diverse backgrounds. Thus, there is a need for instructional approaches to promote students’ problem-solving in mathematics, especially in heterogeneous classrooms in which students with diverse backgrounds and needs are educated together. Small group instructional approaches have been suggested as important to promote learning of low-achieving students and students with special needs ( Kunsch et al., 2007 ). One such approach is cooperative learning (CL), which involves structured collaboration in heterogeneous groups, guided by five principles to enhance group cohesion ( Johnson et al., 1993 ; Johnson et al., 2009 ; Gillies, 2016 ). While CL has been well-researched in whole classroom approaches ( Capar and Tarim, 2015 ), few studies of the approach exist with regard to students with special educational needs (SEN; McMaster and Fuchs, 2002 ). This study contributes to previous research by studying the effects of the CL approach on students’ mathematical problem-solving in heterogeneous classrooms, in which students with special needs are educated alongside with their peers.
Group collaboration through the CL approach is structured in accordance with five principles of collaboration: positive interdependence, individual accountability, explicit instruction in social skills, promotive interaction, and group processing ( Johnson et al., 1993 ). First, the group tasks need to be structured so that all group members feel dependent on each other in the completion of the task, thus promoting positive interdependence. Second, for individual accountability, the teacher needs to assure that each group member feels responsible for his or her share of work, by providing opportunities for individual reports or evaluations. Third, the students need explicit instruction in social skills that are necessary for collaboration. Fourth, the tasks and seat arrangements should be designed to promote interaction among group members. Fifth, time needs to be allocated to group processing, through which group members can evaluate their collaborative work to plan future actions. Using these principles for cooperation leads to gains in mathematics, according to Capar and Tarim (2015) , who conducted a meta-analysis on studies of cooperative learning and mathematics, and found an increase of .59 on students’ mathematics achievement scores in general. However, the number of reviewed studies was limited, and researchers suggested a need for more research. In the current study, we focused on the effect of CL approach in a specific area of mathematics: problem-solving.
Mathematical problem-solving is a central area of mathematics instruction, constituting an important part of preparing students to function in modern society ( Gravemeijer et al., 2017 ). In fact, problem-solving instruction creates opportunities for students to apply their knowledge of mathematical concepts, integrate and connect isolated pieces of mathematical knowledge, and attain a deeper conceptual understanding of mathematics as a subject ( Lester and Cai, 2016 ). Some researchers suggest that mathematics itself is a science of problem-solving and of developing theories and methods for problem-solving ( Hamilton, 2007 ; Davydov, 2008 ).
Problem-solving processes have been studied from different perspectives ( Lesh and Zawojewski, 2007 ). Problem-solving heuristics Pólya, (1948) has largely influenced our perceptions of problem-solving, including four principles: understanding the problem, devising a plan, carrying out the plan, and looking back and reflecting upon the suggested solution. Schoenfield, (2016) suggested the use of specific problem-solving strategies for different types of problems, which take into consideration metacognitive processes and students’ beliefs about problem-solving. Further, models and modelling perspectives on mathematics ( Lesh and Doerr, 2003 ; Lesh and Zawojewski, 2007 ) emphasize the importance of engaging students in model-eliciting activities in which problem situations are interpreted mathematically, as students make connections between problem information and knowledge of mathematical operations, patterns, and rules ( Mousoulides et al., 2010 ; Stohlmann and Albarracín, 2016 ).
Not all students, however, find it easy to solve complex mathematical problems. Students may experience difficulties in identifying solution-relevant elements in a problem or visualizing appropriate solution to a problem situation. Furthermore, students may need help recognizing the underlying model in problems. For example, in two studies by Degrande et al. (2016) , students in grades four to six were presented with mathematical problems in the context of proportional reasoning. The authors found that the students, when presented with a word problem, could not identify an underlying model, but rather focused on superficial characteristics of the problem. Although the students in the study showed more success when presented with a problem formulated in symbols, the authors pointed out a need for activities that help students distinguish between different proportional problem types. Furthermore, students exhibiting specific learning difficulties may need additional support in both general problem-solving strategies ( Lein et al., 2020 ; Montague et al., 2014 ) and specific strategies pertaining to underlying models in problems. The CL intervention in the present study focused on supporting students in problem-solving, through instruction in problem-solving principles ( Pólya, 1948 ), specifically applied to three models of mathematical problem-solving—multiplication/division, geometry, and proportionality.
Students’ problem-solving may be enhanced through participation in small group discussions. In a small group setting, all the students have the opportunity to explain their solutions, clarify their thinking, and enhance understanding of a problem at hand ( Yackel et al., 1991 ; Webb and Mastergeorge, 2003 ). In fact, small group instruction promotes students’ learning in mathematics by providing students with opportunities to use language for reasoning and conceptual understanding ( Mercer and Sams, 2006 ), to exchange different representations of the problem at hand ( Fujita et al., 2019 ), and to become aware of and understand groupmates’ perspectives in thinking ( Kazak et al., 2015 ). These opportunities for learning are created through dialogic spaces characterized by openness to each other’s perspectives and solutions to mathematical problems ( Wegerif, 2011 ).
However, group collaboration is not only associated with positive experiences. In fact, studies show that some students may not be given equal opportunities to voice their opinions, due to academic status differences ( Langer-Osuna, 2016 ). Indeed, problem-solvers struggling with complex tasks may experience negative emotions, leading to uncertainty of not knowing the definite answer, which places demands on peer support ( Jordan and McDaniel, 2014 ; Hannula, 2015 ). Thus, especially in heterogeneous groups, students may need additional support to promote group interaction. Therefore, in this study, we used a cooperative learning approach, which, in contrast to collaborative learning approaches, puts greater focus on supporting group cohesion through instruction in social skills and time for reflection on group work ( Davidson and Major, 2014 ).
Although cooperative learning approach is intended to promote cohesion and peer acceptance in heterogeneous groups ( Rzoska and Ward, 1991 ), previous studies indicate that challenges in group dynamics may lead to unequal participation ( Mulryan, 1992 ; Cohen, 1994 ). Peer-learning behaviours may impact students’ problem-solving ( Hwang and Hu, 2013 ) and working in groups with peers who are seen as friends may enhance students’ motivation to learn mathematics ( Deacon and Edwards, 2012 ). With the importance of peer support in mind, this study set out to investigate whether the results of the intervention using the CL approach are associated with students’ peer acceptance and friendships.
The Present Study
In previous research, the CL approach has shown to be a promising approach in teaching and learning mathematics ( Capar and Tarim, 2015 ), but fewer studies have been conducted in whole-class approaches in general and students with SEN in particular ( McMaster and Fuchs, 2002 ). This study aims to contribute to previous research by investigating the effect of CL intervention on students’ mathematical problem-solving in grade 5. With regard to the complexity of mathematical problem-solving ( Lesh and Zawojewski, 2007 ; Degrande et al., 2016 ; Stohlmann and Albarracín, 2016 ), the CL approach in this study was combined with problem-solving principles pertaining to three underlying models of problem-solving—multiplication/division, geometry, and proportionality. Furthermore, considering the importance of peer support in problem-solving in small groups ( Mulryan, 1992 ; Cohen, 1994 ; Hwang and Hu, 2013 ), the study investigated how peer acceptance and friendships were associated with the effect of the CL approach on students’ problem-solving abilities. The study aimed to find answers to the following research questions:
a) What is the effect of CL approach on students’ problem-solving in mathematics?
b) Are social acceptance and friendship associated with the effect of CL on students’ problem-solving in mathematics?
Participants
The participants were 958 students in grade 5 and their teachers. According to power analyses prior to the start of the study, 1,020 students and 51 classes were required, with an expected effect size of 0.30 and power of 80%, provided that there are 20 students per class and intraclass correlation is 0.10. An invitation to participate in the project was sent to teachers in five municipalities via e-mail. Furthermore, the information was posted on the website of Uppsala university and distributed via Facebook interest groups. As shown in Figure 1 , teachers of 1,165 students agreed to participate in the study, but informed consent was obtained only for 958 students (463 in the intervention and 495 in the control group). Further attrition occurred at pre- and post-measurement, resulting in 581 students’ tests as a basis for analyses (269 in the intervention and 312 in the control group). Fewer students (n = 493) were finally included in the analyses of the association of students’ social acceptance and friendships and the effect of CL on students’ mathematical problem-solving (219 in the intervention and 274 in the control group). The reasons for attrition included teacher drop out due to sick leave or personal circumstances (two teachers in the control group and five teachers in the intervention group). Furthermore, some students were sick on the day of data collection and some teachers did not send the test results to the researchers.
FIGURE 1 . Flow chart for participants included in data collection and data analysis.
As seen in Table 1 , classes in both intervention and control groups included 27 students on average. For 75% of the classes, there were 33–36% of students with SEN. In Sweden, no formal medical diagnosis is required for the identification of students with SEN. It is teachers and school welfare teams who decide students’ need for extra adaptations or special support ( Swedish National Educational Agency, 2014 ). The information on individual students’ type of SEN could not be obtained due to regulations on the protection of information about individuals ( SFS 2009 ). Therefore, the information on the number of students with SEN on class level was obtained through teacher reports.
TABLE 1 . Background characteristics of classes and teachers in intervention and control groups.
Intervention
The intervention using the CL approach lasted for 15 weeks and the teachers worked with the CL approach three to four lessons per week. First, the teachers participated in two-days training on the CL approach, using an especially elaborated CL manual ( Klang et al., 2018 ). The training focused on the five principles of the CL approach (positive interdependence, individual accountability, explicit instruction in social skills, promotive interaction, and group processing). Following the training, the teachers introduced the CL approach in their classes and focused on group-building activities for 7 weeks. Then, 2 days of training were provided to teachers, in which the CL approach was embedded in activities in mathematical problem-solving and reading comprehension. Educational materials containing mathematical problems in the areas of multiplication and division, geometry, and proportionality were distributed to the teachers ( Karlsson and Kilborn, 2018a ). In addition to the specific problems, adapted for the CL approach, the educational materials contained guidance for the teachers, in which problem-solving principles ( Pólya, 1948 ) were presented as steps in problem-solving. Following the training, the teachers applied the CL approach in mathematical problem-solving lessons for 8 weeks.
Solving a problem is a matter of goal-oriented reasoning, starting from the understanding of the problem to devising its solution by using known mathematical models. This presupposes that the current problem is chosen from a known context ( Stillman et al., 2008 ; Zawojewski, 2010 ). This differs from the problem-solving of the textbooks, which is based on an aim to train already known formulas and procedures ( Hamilton, 2007 ). Moreover, it is important that students learn modelling according to their current abilities and conditions ( Russel, 1991 ).
In order to create similar conditions in the experiment group and the control group, the teachers were supposed to use the same educational material ( Karlsson and Kilborn, 2018a ; Karlsson and Kilborn, 2018b ), written in light of the specified view of problem-solving. The educational material is divided into three areas—multiplication/division, geometry, and proportionality—and begins with a short teachers’ guide, where a view of problem solving is presented, which is based on the work of Polya (1948) and Lester and Cai (2016) . The tasks are constructed in such a way that conceptual knowledge was in focus, not formulas and procedural knowledge.
Implementation of the Intervention
To ensure the implementation of the intervention, the researchers visited each teachers’ classroom twice during the two phases of the intervention period, as described above. During each visit, the researchers observed the lesson, using a checklist comprising the five principles of the CL approach. After the lesson, the researchers gave written and oral feedback to each teacher. As seen in Table 1 , in 18 of the 23 classes, the teachers implemented the intervention in accordance with the principles of CL. In addition, the teachers were asked to report on the use of the CL approach in their teaching and the use of problem-solving activities embedding CL during the intervention period. As shown in Table 1 , teachers in only 11 of 23 classes reported using the CL approach and problem-solving activities embedded in the CL approach at least once a week.
Control Group
The teachers in the control group received 2 days of instruction in enhancing students’ problem-solving and reading comprehension. The teachers were also supported with educational materials including mathematical problems Karlsson and Kilborn (2018b) and problem-solving principles ( Pólya, 1948 ). However, none of the activities during training or in educational materials included the CL approach. As seen in Table 1 , only 10 of 25 teachers reported devoting at least one lesson per week to mathematical problem-solving.
Tests of Mathematical Problem-Solving
Tests of mathematical problem-solving were administered before and after the intervention, which lasted for 15 weeks. The tests were focused on the models of multiplication/division, geometry, and proportionality. The three models were chosen based on the syllabus of the subject of mathematics in grades 4 to 6 in the Swedish National Curriculum ( Swedish National Educational Agency, 2018 ). In addition, the intention was to create a variation of types of problems to solve. For each of these three models, there were two tests, a pre-test and a post-test. Each test contained three tasks with increasing difficulty ( Supplementary Appendix SA ).
The tests of multiplication and division (Ma1) were chosen from different contexts and began with a one-step problem, while the following two tasks were multi-step problems. Concerning multiplication, many students in grade 5 still understand multiplication as repeated addition, causing significant problems, as this conception is not applicable to multiplication beyond natural numbers ( Verschaffel et al., 2007 ). This might be a hindrance in developing multiplicative reasoning ( Barmby et al., 2009 ). The multi-step problems in this study were constructed to support the students in multiplicative reasoning.
Concerning the geometry tests (Ma2), it was important to consider a paradigm shift concerning geometry in education that occurred in the mid-20th century, when strict Euclidean geometry gave way to other aspects of geometry like symmetry, transformation, and patterns. van Hiele (1986) prepared a new taxonomy for geometry in five steps, from a visual to a logical level. Therefore, in the tests there was a focus on properties of quadrangles and triangles, and how to determine areas by reorganising figures into new patterns. This means that structure was more important than formulas.
The construction of tests of proportionality (M3) was more complicated. Firstly, tasks on proportionality can be found in many different contexts, such as prescriptions, scales, speeds, discounts, interest, etc. Secondly, the mathematical model is complex and requires good knowledge of rational numbers and ratios ( Lesh et al., 1988 ). It also requires a developed view of multiplication, useful in operations with real numbers, not only as repeated addition, an operation limited to natural numbers ( Lybeck, 1981 ; Degrande et al., 2016 ). A linear structure of multiplication as repeated addition leads to limitations in terms of generalization and development of the concept of multiplication. This became evident in a study carried out in a Swedish context ( Karlsson and Kilborn, 2018c ). Proportionality can be expressed as a/b = c/d or as a/b = k. The latter can also be expressed as a = b∙k, where k is a constant that determines the relationship between a and b. Common examples of k are speed (km/h), scale, and interest (%). An important pre-knowledge in order to deal with proportions is to master fractions as equivalence classes like 1/3 = 2/6 = 3/9 = 4/12 = 5/15 = 6/18 = 7/21 = 8/24 … ( Karlsson and Kilborn, 2020 ). It was important to take all these aspects into account when constructing and assessing the solutions of the tasks.
The tests were graded by an experienced teacher of mathematics (4 th author) and two students in their final year of teacher training. Prior to grading, acceptable levels of inter-rater reliability were achieved by independent rating of students’ solutions and discussions in which differences between the graders were resolved. Each student response was to be assigned one point when it contained a correct answer and two points when the student provided argumentation for the correct answer and elaborated on explanation of his or her solution. The assessment was thus based on quality aspects with a focus on conceptual knowledge. As each subtest contained three questions, it generated three student solutions. So, scores for each subtest ranged from 0 to 6 points and for the total scores from 0 to 18 points. To ascertain that pre- and post-tests were equivalent in degree of difficulty, the tests were administered to an additional sample of 169 students in grade 5. Test for each model was conducted separately, as students participated in pre- and post-test for each model during the same lesson. The order of tests was switched for half of the students in order to avoid the effect of the order in which the pre- and post-tests were presented. Correlation between students’ performance on pre- and post-test was .39 ( p < 0.000) for tests of multiplication/division; .48 ( p < 0.000) for tests of geometry; and .56 ( p < 0.000) for tests of proportionality. Thus, the degree of difficulty may have differed between pre- and post-test.
Measures of Peer Acceptance and Friendships
To investigate students’ peer acceptance and friendships, peer nominations rated pre- and post-intervention were used. Students were asked to nominate peers who they preferred to work in groups with and who they preferred to be friends with. Negative peer nominations were avoided due to ethical considerations raised by teachers and parents ( Child and Nind, 2013 ). Unlimited nominations were used, as these are considered to have high ecological validity ( Cillessen and Marks, 2017 ). Peer nominations were used as a measure of social acceptance, and reciprocated nominations were used as a measure of friendship. The number of nominations for each student were aggregated and divided by the number of nominators to create a proportion of nominations for each student ( Velásquez et al., 2013 ).
Statistical Analyses
Multilevel regression analyses were conducted in R, lme4 package Bates et al. (2015) to account for nestedness in the data. Students’ classroom belonging was considered as a level 2 variable. First, we used a model in which students’ results on tests of problem-solving were studied as a function of time (pre- and post) and group belonging (intervention and control group). Second, the same model was applied to subgroups of students who performed above and below median at pre-test, to explore whether the CL intervention had a differential effect on student performance. In this second model, the results for subgroups of students could not be obtained for geometry tests for subgroup below median and for tests of proportionality for subgroup above median. A possible reason for this must have been the skewed distribution of the students in these subgroups. Therefore, another model was applied that investigated students’ performances in math at both pre- and post-test as a function of group belonging. Third, the students’ scores on social acceptance and friendships were added as an interaction term to the first model. In our previous study, students’ social acceptance changed as a result of the same CL intervention ( Klang et al., 2020 ).
The assumptions for the multilevel regression were assured during the analyses ( Snijders and Bosker, 2012 ). The assumption of normality of residuals were met, as controlled by visual inspection of quantile-quantile plots. For subgroups, however, the plotted residuals deviated somewhat from the straight line. The number of outliers, which had a studentized residual value greater than ±3, varied from 0 to 5, but none of the outliers had a Cook’s distance value larger than 1. The assumption of multicollinearity was met, as the variance inflation factors (VIF) did not exceed a value of 10. Before the analyses, the cases with missing data were deleted listwise.
What Is the Effect of the CL Approach on Students’ Problem-Solving in Mathematics?
As seen in the regression coefficients in Table 2 , the CL intervention had a significant effect on students’ mathematical problem-solving total scores and students’ scores in problem solving in geometry (Ma2). Judging by mean values, students in the intervention group appeared to have low scores on problem-solving in geometry but reached the levels of problem-solving of the control group by the end of the intervention. The intervention did not have a significant effect on students’ performance in problem-solving related to models of multiplication/division and proportionality.
TABLE 2 . Mean scores (standard deviation in parentheses) and unstandardized multilevel regression estimates for tests of mathematical problem-solving.
The question is, however, whether CL intervention affected students with different pre-test scores differently. Table 2 includes the regression coefficients for subgroups of students who performed below and above median at pre-test. As seen in the table, the CL approach did not have a significant effect on students’ problem-solving, when the sample was divided into these subgroups. A small negative effect was found for intervention group in comparison to control group, but confidence intervals (CI) for the effect indicate that it was not significant.
Is Social Acceptance and Friendships Associated With the Effect of CL on Students’ Problem-Solving in Mathematics?
As seen in Table 3 , students’ peer acceptance and friendship at pre-test were significantly associated with the effect of the CL approach on students’ mathematical problem-solving scores. Changes in students’ peer acceptance and friendships were not significantly associated with the effect of the CL approach on students’ mathematical problem-solving. Consequently, it can be concluded that being nominated by one’s peers and having friends at the start of the intervention may be an important factor when participation in group work, structured in accordance with the CL approach, leads to gains in mathematical problem-solving.
TABLE 3 . Mean scores (standard deviation in parentheses) and unstandardized multilevel regression estimates for tests of mathematical problem-solving, including scores of social acceptance and friendship in the model.
In light of the limited number of studies on the effects of CL on students’ problem-solving in whole classrooms ( Capar and Tarim, 2015 ), and for students with SEN in particular ( McMaster and Fuchs, 2002 ), this study sought to investigate whether the CL approach embedded in problem-solving activities has an effect on students’ problem-solving in heterogeneous classrooms. The need for the study was justified by the challenge of providing equitable mathematics instruction to heterogeneous student populations ( OECD, 2019 ). Small group instructional approaches as CL are considered as promising approaches in this regard ( Kunsch et al., 2007 ). The results showed a significant effect of the CL approach on students’ problem-solving in geometry and total problem-solving scores. In addition, with regard to the importance of peer support in problem-solving ( Deacon and Edwards, 2012 ; Hwang and Hu, 2013 ), the study explored whether the effect of CL on students’ problem-solving was associated with students’ social acceptance and friendships. The results showed that students’ peer acceptance and friendships at pre-test were significantly associated with the effect of the CL approach, while change in students’ peer acceptance and friendships from pre- to post-test was not.
The results of the study confirm previous research on the effect of the CL approach on students’ mathematical achievement ( Capar and Tarim, 2015 ). The specific contribution of the study is that it was conducted in classrooms, 75% of which were composed of 33–36% of students with SEN. Thus, while a previous review revealed inconclusive findings on the effects of CL on student achievement ( McMaster and Fuchs, 2002 ), the current study adds to the evidence of the effect of the CL approach in heterogeneous classrooms, in which students with special needs are educated alongside with their peers. In a small group setting, the students have opportunities to discuss their ideas of solutions to the problem at hand, providing explanations and clarifications, thus enhancing their understanding of problem-solving ( Yackel et al., 1991 ; Webb and Mastergeorge, 2003 ).
In this study, in accordance with previous research on mathematical problem-solving ( Lesh and Zawojewski, 2007 ; Degrande et al., 2016 ; Stohlmann and Albarracín, 2016 ), the CL approach was combined with training in problem-solving principles Pólya (1948) and educational materials, providing support in instruction in underlying mathematical models. The intention of the study was to provide evidence for the effectiveness of the CL approach above instruction in problem-solving, as problem-solving materials were accessible to teachers of both the intervention and control groups. However, due to implementation challenges, not all teachers in the intervention and control groups reported using educational materials and training as expected. Thus, it is not possible to draw conclusions of the effectiveness of the CL approach alone. However, in everyday classroom instruction it may be difficult to separate the content of instruction from the activities that are used to mediate this content ( Doerr and Tripp, 1999 ; Gravemeijer, 1999 ).
Furthermore, for successful instruction in mathematical problem-solving, scaffolding for content needs to be combined with scaffolding for dialogue ( Kazak et al., 2015 ). From a dialogical perspective ( Wegerif, 2011 ), students may need scaffolding in new ways of thinking, involving questioning their understandings and providing arguments for their solutions, in order to create dialogic spaces in which different solutions are voiced and negotiated. In this study, small group instruction through CL approach aimed to support discussions in small groups, but the study relies solely on quantitative measures of students’ mathematical performance. Video-recordings of students’ discussions may have yielded important insights into the dialogic relationships that arose in group discussions.
Despite the positive findings of the CL approach on students’ problem-solving, it is important to note that the intervention did not have an effect on students’ problem-solving pertaining to models of multiplication/division and proportionality. Although CL is assumed to be a promising instructional approach, the number of studies on its effect on students’ mathematical achievement is still limited ( Capar and Tarim, 2015 ). Thus, further research is needed on how CL intervention can be designed to promote students’ problem-solving in other areas of mathematics.
The results of this study show that the effect of the CL intervention on students’ problem-solving was associated with students’ initial scores of social acceptance and friendships. Thus, it is possible to assume that students who were popular among their classmates and had friends at the start of the intervention also made greater gains in mathematical problem-solving as a result of the CL intervention. This finding is in line with Deacon and Edwards’ study of the importance of friendships for students’ motivation to learn mathematics in small groups ( Deacon and Edwards, 2012 ). However, the effect of the CL intervention was not associated with change in students’ social acceptance and friendship scores. These results indicate that students who were nominated by a greater number of students and who received a greater number of friends did not benefit to a great extent from the CL intervention. With regard to previously reported inequalities in cooperation in heterogeneous groups ( Cohen, 1994 ; Mulryan, 1992 ; Langer Osuna, 2016 ) and the importance of peer behaviours for problem-solving ( Hwang and Hu, 2013 ), teachers should consider creating inclusive norms and supportive peer relationships when using the CL approach. The demands of solving complex problems may create negative emotions and uncertainty ( Hannula, 2015 ; Jordan and McDaniel, 2014 ), and peer support may be essential in such situations.
Limitations
The conclusions from the study must be interpreted with caution, due to a number of limitations. First, due to the regulation of protection of individuals ( SFS 2009 ), the researchers could not get information on type of SEN for individual students, which limited the possibilities of the study for investigating the effects of the CL approach for these students. Second, not all teachers in the intervention group implemented the CL approach embedded in problem-solving activities and not all teachers in the control group reported using educational materials on problem-solving. The insufficient levels of implementation pose a significant challenge to the internal validity of the study. Third, the additional investigation to explore the equivalence in difficulty between pre- and post-test, including 169 students, revealed weak to moderate correlation in students’ performance scores, which may indicate challenges to the internal validity of the study.
Implications
The results of the study have some implications for practice. Based on the results of the significant effect of the CL intervention on students’ problem-solving, the CL approach appears to be a promising instructional approach in promoting students’ problem-solving. However, as the results of the CL approach were not significant for all subtests of problem-solving, and due to insufficient levels of implementation, it is not possible to conclude on the importance of the CL intervention for students’ problem-solving. Furthermore, it appears to be important to create opportunities for peer contacts and friendships when the CL approach is used in mathematical problem-solving activities.
Data Availability Statement
The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation.
Ethics Statement
The studies involving human participants were reviewed and approved by the Uppsala Ethical Regional Committee, Dnr. 2017/372. Written informed consent to participate in this study was provided by the participants’ legal guardian/next of kin.
Author Contributions
NiK was responsible for the project, and participated in data collection and data analyses. NaK and WK were responsible for intervention with special focus on the educational materials and tests in mathematical problem-solving. PE participated in the planning of the study and the data analyses, including coordinating analyses of students’ tests. MK participated in the designing and planning the study as well as data collection and data analyses.
The project was funded by the Swedish Research Council under Grant 2016-04,679.
Conflict of Interest
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
Publisher’s Note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.
Acknowledgments
We would like to express our gratitude to teachers who participated in the project.
Supplementary Material
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/feduc.2021.710296/full#supplementary-material
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Keywords: cooperative learning, mathematical problem-solving, intervention, heterogeneous classrooms, hierarchical linear regression analysis
Citation: Klang N, Karlsson N, Kilborn W, Eriksson P and Karlberg M (2021) Mathematical Problem-Solving Through Cooperative Learning—The Importance of Peer Acceptance and Friendships. Front. Educ. 6:710296. doi: 10.3389/feduc.2021.710296
Received: 15 May 2021; Accepted: 09 August 2021; Published: 24 August 2021.
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Copyright © 2021 Klang, Karlsson, Kilborn, Eriksson and Karlberg. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Nina Klang, [email protected]
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
Problem Posing Via Scriptwriting: What Instructional Flows Do Mathematics Teachers Use in Implementing the Problem-Posing Task?
- Published: 24 September 2024
Cite this article
- Tuğrul Kar ORCID: orcid.org/0000-0001-8336-1327 1 ,
- Ferhat Öztürk ORCID: orcid.org/0000-0003-2849-8325 2 ,
- Mehmet Fatih Öçal ORCID: orcid.org/0000-0003-0428-6176 3 &
- Merve Özkaya ORCID: orcid.org/0000-0002-0436-4931 4
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The present study aimed to describe teachers’ instructional flows when implementing a mathematical problem-posing task using scriptwriting technique. With matchsticks, a growing pattern that increases by a constant unit was created and presented to the teachers as a problem-posing situation. We analyzed the instructional flows in 50 scripts, taking into account situations recognized in the problem-posing field as critical for integrating problem posing into mathematics classrooms. We determined three instructional flows in the scripts: pose and solve cycle-based, observation-based, and problem-solving based, the first being the most common. We presented a new problem-posing instructional model and discussed its potential benefits for student learning.
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Cai, J. (2022). What research says about teaching mathematics through problem posing. Éducation & Didactique, 16 (3), 31–50. https://doi.org/10.4000/educationdidactique.10642
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Kar, T., Öztürk, F., Öçal, M.F. et al. Problem Posing Via Scriptwriting: What Instructional Flows Do Mathematics Teachers Use in Implementing the Problem-Posing Task?. Int J of Sci and Math Educ (2024). https://doi.org/10.1007/s10763-024-10507-w
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Solving the robust shortest path problem with multimodal transportation.
1. Introduction
2. problem description and mathematical formulation.
- Three transportation modes are considered: airway, railway, and road in decreasing priority order.
- The transportation mode can only be transferred from a higher-priority mode to a lower-priority mode. We denote f 1 < f 2 if transportation mode f 1 has higher priority than transportation mode f 2 .
- The transportation task must be continuously delivered both spatially and temporally.
- Transfer between different transportation modes occurs only at nodes in the transport network.
- The transportation task can be split into batches. Each batch in the task cannot be split during transportation; in other words, a batch is the smallest unit for transportation.
3. Robust Shortest Path Algorithm with Multimodal Transportation
- Determine the sub-network of the highest priority N f h i g h of the origin s and mark the priority level as a , starting from node s a .
- Introduce Γ to record the time uncertainty. Set every node that has Γ + 1 states. Each state records the specific time uncertainty count; i.e., the i th state counts the nodes with i edge time uncertainties. The i th state also records the minimum objective value with i − 1 edge time uncertainties. The nodes under i th state can only update minimum objective values by the nodes with the i th state and the nodes with the ( i − 1 )th state plus one more edge time uncertainty. Initially, the 1st state counts the nodes with one edge time uncertainty and the minimum objective value without edge time uncertainties.
- Introduce sets P and H . Set P records the node with Γ + 1 states whose minimum objective value has been obtained; set H records the node with Γ + 1 states that has not been visited. Initially, set P contains only node s a with 1th state.
- Traverse set H to determine the node with the minimum objective values for Γ + 1 states and then add the node to set P and update the objective value and path of the node in set H .
- Repeat the above steps until the endpoint q p ( p ≥ a ) under ( Γ + 1 )th state is reached and compare the objective value of different endpoints q p ( p ≥ a ) under ( Γ + 1 )th state to determine the minimum value.
modified Dijkstra algorithm for time minimization |
4. Computational Results
4.1. test instances, 4.2. computational results, 5. conclusions, author contributions, data availability statement, conflicts of interest.
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Click here to enlarge figure
Notations | Definition |
---|---|
F | Set of transportation modes |
f | Index of transportation modes and |
Sub-network of transportation mode f | |
Transportation time of the edge under transportation mode f | |
Transportation time uncertainty of the edge under transportation mode f | |
Whether the task can transfer from transportation mode to | |
( has a higher priority than ) | |
s | Origin of the task |
q | Destination of the task |
The count number of uncertainty |
Notations | Definition |
---|---|
Binary variable indicating whether the task selects | |
the edge to transport under transportation mode f | |
Binary variable indicating whether the task selects | |
the edge with time uncertainty under transportation mode f | |
Binary variable indicating whether the task transfers | |
from transportation mode to at node i | |
( has a higher priority than ) |
Notations | Definition |
---|---|
Sub-network of priority level l under transportation mode f | |
Origin of the sub-network of priority level l under mth state | |
Endpoint of the sub-network of priority level l under mth state | |
Transportation mode f reaching node i | |
Node j in a partial path reached by transportation mode f |
Runtime (ms) | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||
1 | 7.278 | 423.002 | 110.595 | 2637.592 | 550.793 | 8711.174 | 993.246 | 24,327.503 | 2862.953 | 54,215.121 | ||||
2 | 11.253 | 493.511 | 173.847 | 2882.893 | 718.668 | 10,433.196 | 2240.766 | 29,497.623 | 3964.262 | 66,170.130 | ||||
3 | 24.372 | 441.005 | 157.540 | 2932.139 | 1429.670 | 10,783.470 | 2521.793 | 30,265.798 | 8196.901 | 70,150.986 | ||||
4 | 18.103 | 430.475 | 233.134 | 2954.558 | 755.944 | 11,094.770 | 4505.756 | 30,990.257 | 11,078.559 | 71,324.390 | ||||
5 | 15.489 | 510.637 | 159.575 | 2954.820 | 1132.525 | 10,962.366 | 4841.039 | 30,835.058 | 8426.504 | 72,846.445 | ||||
6 | 19.535 | 463.967 | 128.296 | 3051.806 | 1103.992 | 11,132.195 | 2413.254 | 31,218.689 | 11,213.833 | 75,495.389 | ||||
7 | 15.613 | 430.851 | 271.472 | 2980.387 | 902.963 | 10,999.644 | 4860.665 | 31,540.346 | 10,490.408 | 73,807.403 | ||||
8 | 17.871 | 475.181 | 212.329 | 2909.462 | 1200.686 | 10,985.363 | 4174.486 | 31,643.620 | 10,672.481 | 73,901.113 | ||||
9 | 14.301 | 412.058 | 265.682 | 2874.462 | 1162.846 | 10,989.971 | 2847.673 | 31,208.782 | 12,031.574 | 72,515.095 | ||||
10 | 22.682 | 412.400 | 192.382 | 2960.643 | 1525.328 | 11,214.807 | 3497.445 | 31,087.398 | 11,068.007 | 71,393.307 |
Runtime (ms) | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||
1 | 17.238 | 418.732 | 268.129 | 2550.418 | 1402.919 | 9462.940 | 4733.922 | 26,149.567 | 11,078.051 | 57,176.717 | ||||
2 | 32.565 | 494.705 | 496.606 | 3186.625 | 2464.0584 | 10,898.998 | 7519.554 | 31,542.232 | 19,485.171 | 69,680.467 | ||||
3 | 33.823 | 432.627 | 650.264 | 3264.560 | 2823.364 | 11,352.557 | 8517.058 | 33,131.995 | 20,796.233 | 72,820.373 | ||||
4 | 45.527 | 510.491 | 680.459 | 3353.501 | 2472.157 | 11,629.197 | 8676.551 | 33,657.071 | 22,186.316 | 74,530.851 | ||||
5 | 50.290 | 591.610 | 658.664 | 3301.744 | 2874.847 | 11,514.545 | 9861.291 | 32,806.336 | 24,753.942 | 74,546.622 | ||||
6 | 40.464 | 524.168 | 620.006 | 3205.702 | 3118.409 | 11,787.018 | 8990.755 | 32,455.911 | 20,949.771 | 74,844.672 | ||||
7 | 43.185 | 551.411 | 524.797 | 3145.348 | 2940.171 | 115,03.829 | 8922.650 | 32,497.091 | 27,031.230 | 74,868.860 | ||||
8 | 51.979 | 506.058 | 634.052 | 3103.811 | 3273.129 | 11,674.437 | 9951.441 | 32,762.134 | 26,563.325 | 74,771.714 | ||||
9 | 37.312 | 434.919 | 574.568 | 3063.391 | 2897.492 | 11622.295 | 9999.172 | 32,635.582 | 19,098.746 | 75,294.255 | ||||
10 | 52.501 | 504.257 | 644.516 | 2956.802 | 2788.958 | 11,593.289 | 10,829.958 | 32,696.117 | 25,021.439 | 74,954.247 |
Runtime (ms) | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||
1 | 36.850 | 396.278 | 421.341 | 2592.620 | 2122.296 | 9916.470 | 7524.603 | 25,311.944 | 17,220.206 | 56,887.450 | ||||
2 | 59.978 | 435.166 | 766.841 | 2854.324 | 3643.604 | 11,452.806 | 13,116.612 | 30,177.502 | 26,834.291 | 70,150.291 | ||||
3 | 59.525 | 499.039 | 1002.466 | 3149.591 | 4057.011 | 11,901.889 | 13,966.180 | 31,974.920 | 33,399.846 | 73,205.453 | ||||
4 | 65.489 | 436.960 | 1030.648 | 2966.882 | 4138.071 | 11,837.376 | 14,790.347 | 32,599.834 | 36,514.560 | 74,773.483 | ||||
5 | 90.973 | 420.973 | 918.835 | 3030.146 | 5218.938 | 11,922.836 | 15,099.412 | 32,734.140 | 35,751.015 | 75,615.666 | ||||
6 | 82.274 | 490.658 | 1023.838 | 3005.166 | 5001.499 | 12,227.741 | 15,279.666 | 32,586.722 | 38,369.579 | 74,842.386 | ||||
7 | 83.950 | 451.949 | 1112.809 | 3043.065 | 4341.996 | 12,052.712 | 14,976.950 | 32,887.711 | 34,817.180 | 75,255.087 | ||||
8 | 73.490 | 428.104 | 1038.935 | 3003.592 | 4998.427 | 12,078.351 | 15,288.732 | 32,947.935 | 36,449.765 | 75,578.462 | ||||
9 | 94.633 | 489.919 | 1081.681 | 2968.710 | 4454.378 | 12,024.727 | 15,614.585 | 32,677.216 | 33,693.933 | 74,732.153 | ||||
10 | 75.327 | 438.935 | 982.654 | 3030.528 | 4174.200 | 11,938.702 | 14,837.810 | 32,720.128 | 32,077.390 | 75,442.775 |
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Guo, J.; Liu, T.; Song, G.; Guo, B. Solving the Robust Shortest Path Problem with Multimodal Transportation. Mathematics 2024 , 12 , 2978. https://doi.org/10.3390/math12192978
Guo J, Liu T, Song G, Guo B. Solving the Robust Shortest Path Problem with Multimodal Transportation. Mathematics . 2024; 12(19):2978. https://doi.org/10.3390/math12192978
Guo, Jinzuo, Tianyu Liu, Guopeng Song, and Bo Guo. 2024. "Solving the Robust Shortest Path Problem with Multimodal Transportation" Mathematics 12, no. 19: 2978. https://doi.org/10.3390/math12192978
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IMAGES
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Strategies for solving the problem. 1. Draw a model or diagram. Students may find it useful to draw a model, picture, diagram, or other visual aid to help with the problem solving process. It can help to visualize the problem to understand the relationships between the numbers in the problem.
Problem Solving the Thinking Blocks® Way! We updated our Thinking Blocks suite of learning tools with all new features. read aloud word problems - visual prompts - better models - engaging themes - mobile friendly.
Step 1: Understanding the problem. We are given in the problem that there are 25 chickens and cows. All together there are 76 feet. Chickens have 2 feet and cows have 4 feet. We are trying to determine how many cows and how many chickens Mr. Jones has on his farm. Step 2: Devise a plan.
Use a Problem-Solving Strategy for Word Problems. We have reviewed translating English phrases into algebraic expressions, using some basic mathematical vocabulary and symbols. We have also translated English sentences into algebraic equations and solved some word problems. The word problems applied math to everyday situations.
A model is a representation of your strategy, the way the strategy looks visibly. Modeling your strategy makes your thinking more clear to others because they can see the thinking and the relationships that went into your process. The model might also be the tool you used to actually do the computation. Models and modeling have many different ...
To solve a word problem, students can pick out the numbers and decide on an operation.". But through the use of mathematical modeling, students are plucked out of the hypothetical realm and plunged into the complexities of reality—presented with opportunities to help solve real-world problems with many variables by generating questions ...
Two common models include Polya's Four-Step Problem-Solving Model and the IDEAL problem-solving model. Polya's Four-Step Problem-Solving Model has the following steps: 1) Understand the problem, 2) Devise a plan, 3) Carry out the plan, and 4) Looking back. The IDEAL model is based on the following steps: 1) Identify The Problem, 2) Define An ...
Learning to Use the Frayer Model in Math . These 4 steps are then applied to the Frayer model template (print the PDF) to guide the problem-solving process and develop an effective way of thinking.When the graphic organizer is used consistently and frequently, over time, there will be a definite improvement in the process of solving problems in math.
Problem identification. Problem analysis. Plan development. Plan implementation. Plan evaluation. Following this 5-step problem-solving approach helps to guide school teams of educators and administrators in engaging in data-based decision making: a core principle of the MTSS framework.
The following video shows more examples of using problem solving strategies and models. Question 2: The table shows the number of seats in each of the first four rows in an auditorium. The remaining ten rows follow the same pattern. Find the number of seats in the last row. Question 3: You are hanging three pictures in the wall of your home ...
Math Problem Solving Strategies. 1. C.U.B.E.S. C.U.B.E.S stands for circle the important numbers, underline the question, box the words that are keywords, eliminate extra information, and solve by showing work. Why I like it: Gives students a very specific 'what to do.'.
Problem-solving is often described as figuring out what to do when you don't know what to do. My power went out unexpectedly this morning, and I have work to do. That's a problem that I had to solve. I had to think about what the problem was, what my options were, and formulate a plan to solve the problem. No keywords.
At its core, the bar model is an explicit teaching and learning strategy for problem-solving. The actual bar model consists of a set of bars or rectangles that represent the quantities in the problem, and the operations are represented by the lengths and arrangements of the bars. Among its strengths is the fact that it can be applied to all ...
In mathematical modelling, formulating a model involves the process of mathematisation — moving from the real world to the mathematical world. Students select and apply mathematical and/or statistical procedures, concepts and techniques previously learnt to solve the mathematical problem to be addressed through their model.
PROBLEM-SOLVING STRATEGIES AND TACTICS. While the importance of prior mathematics content knowledge for problem solving is well established (e.g. Sweller, 1988), how students can be taught to draw on this knowledge effectively, and mobilize it in novel contexts, remains unclear (e.g. Polya, 1957; Schoenfeld, 2013).Without access to teaching techniques that do this, students' mathematical ...
Outline #. The modelling process provides a systematic approach to solving complex problems: Clearly state the problem. Identify variables and parameters. Make assumptions and identify constraints. Build solutions. Analyze and assess. Report results. See also.
The purpose of explicitly modeling mathematics concepts/skills and problem solving strategies is twofold. First, explicit modeling of a target mathematics concept/skill provides students a clear and accessible format for initially acquiring an understanding of the mathematics concept/skill. Explicit modeling by you provides students with a ...
Mathematical Model. You're probably already aware of some very well-known mathematical models - those that give perimeter and area of a square. The models are simply the formulas P = 2 (L) + 2 (W ...
Singer et al. (2013) provides a broad view about problem posing that links problem posing experiences to general mathematics education; to the development of abilities, attitudes and creativity; and also to its interrelation with problem solving, and studies on when and how problem-solving sessions should take place.
IDEAL Model for improving problem solving (Verbatim copy of Fig 2.1; p.12) ... Math: Do example problems before looking at solution to practice concepts. ... Knowledge of CORE CONCEPTS in a field SIMPLIFIES problem solving. Ways to approach a problem of learning information that seems to be arbitrary: Over-learn: rehearse the facts until they ...
Further, models and modelling perspectives on mathematics (Lesh and Doerr, 2003; Lesh and Zawojewski, 2007) emphasize the importance of engaging students in model-eliciting activities in which problem situations are interpreted mathematically, as students make connections between problem information and knowledge of mathematical operations ...
The rapidly advancing fields of machine learning and mathematical modeling, greatly enhanced by the recent growth in artificial intelligence, are the focus of this special issue. This issue compiles extensively revised and improved versions of the top papers from the workshop on Mathematical Modeling and Problem Solving at PDPTA'23, the 29th International Conference on Parallel and Distributed ...
To measure the problem-solving ability of machine learning models, we introduce the MATH dataset, which consists of 12; 500 problems from high school math competitions. Given a problem from MATH, machine learning models generate a sequence, such as $\frac{2}{3}$, that encodes the final answer. These answers are unique after normalization ...
Problem posing, which Liljedahl and Cai have called the younger sibling of problem solving, has begun to gain a prominent and promising place in mathematics curricula and national standards over the past few decades (National Council of Teachers of Mathematics [NCTM], 2000; Turkish Ministry of National Education [MNE], 2018).Students gain several benefits from engaging in problem posing in ...
Recent frontier models 1 do so well on MATH 2 and GSM8K that these benchmarks are no longer effective at differentiating models. We evaluated math performance on AIME, an exam designed to challenge the brightest high school math students in America. ... (11.1/15) with a single sample per problem, 83% (12.5/15) with consensus among 64 samples ...
This paper explores the challenges of finding robust shortest paths in multimodal transportation networks. With the increasing complexity and uncertainties in modern transportation systems, developing efficient and reliable routing strategies that can adapt to various disruptions and modal changes is essential. By incorporating practical constraints in parameter uncertainty, this paper ...