Peer Review

Peer Review

Critique

Opening

Critique

Revise your work on the Self Check problem from the last lesson based on the following questions.

  • How can you tell if Emma's and Chen's work (from the previous Self Check problem) is correct or incorrect?
  • Can you find one problem that you know was done incorrectly?
  • Can you find one problem in which the distributive property was used incorrectly?
  • What do parentheses in a problem tell you?
  • Can you explain why the work you identified as incorrect is not right?

Math Mission

Opening

Use the distributive property and work with expressions to find student errors and fix them.

Correct Student Work

Work Time

Correct Student Work

Work with a partner and try the Self Check task again—this time combining your ideas.

Self Check Task

  1. Imagine that you are the teacher. Decide whether the work shown is correct or incorrect. If you see an incorrect answer, do the following:

    • Cross it out and replace it with a correct answer.
    • Explain what is wrong using words or diagrams.
  2. What was the most common type of error that Emma made?

  3. What was the most common type of error that Chen made?

Hint:

  • What do you already know about the distributive property?
  • What do you already know about how to simplify expressions?

Emma’s and Chen’s Work

Work Time

Emma's and Chen's Work

  1. Emma and Chen have done more work. With your partner, decide whether their work is correct or incorrect. If you see an incorrect answer, do the following:

    • Cross it out and replace it with a correct answer.
    • Explain what is wrong using words or diagrams.
  2. What was the most common type of error that Emma made?

  3. What was the most common type of error that Chen made?

Prepare a Presentation

Work Time

Prepare a Presentation

Explain how you would work with Emma and Chen to improve their work.

 

Challenge Problem

Write an expression that:

  • Is a sum of two terms using a variable of your choice.
  • Has exponents 3 and 2
  • One coefficient is 2 and the other is 4.
  • Compare your expression with that of your partner. Can you make a different expression? Explain why or why not?

Make Connections

Performance Task

Ways of Thinking: Make Connections

Take notes about how your classmates corrected the work and their conclusions about the most common errors that Emma and Chen made.

Hint:

As your classmates present, ask questions such as:

  • What strategy did you use to find the student errors?
  • How could you tell if the work was correct or incorrect?
  • How does your explanation or diagram clearly show what the student did wrong?
  • How did what you have learned about expressions and the distributive property help you evaluate the student work?
  • How did you identify the most common error that each student made?
  • What advice would you give each student about how to deal with problems of this type in the future?

Reflect On Your Work

Work Time

Reflection

Write a reflection about the ideas discussed in class today. Use the sentence starter below if you find it to be helpful.

I could use what I learned in helping Emma and Chen when I …