Check Your work

ACP Lesson Plan
Title: Check Your WorkAuthor: Nick Schaumberg
Subject(s):  Math
Grade Level(s): 6-12Total Time: 50 Minutes

Overview / Description:

This lesson will help students understand why it is important to check their work after they complete a math problem. They will be searching other students' work to find a mistake in the work they completed.

Learning goals/objectives:

After completing this activity, students should be able to . . .

  • check their work.
  • explain their work.
  • understand the importance of quality control.

Workplace Readiness Skill: 

    Social Skills  x Communication 
 x   Teamwork      x    Critical Thinking
   Attitude and Initiative    Planning and Organization
   Professionalism    Media Etiquette

Content Standards:

Wisconsin Standards for Mathematics

Math Practices

Make sense of problems and persevere in solving them.

Construct viable arguments and critique the reasoning of others.

Attend to precision.

Algebra » Reasoning with Equations & Inequalities

Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.

Educational Frameworks

B-LS 1. Demonstrate critical-thinking skills to make informed decisions 

B-LS 9. Gather evidence and consider multiple perspectives to make informed decisions


  • This can be used with any type of solving unit. I will be using this in my Tech Math class in our solving equations unit.  
  • The teacher should have enough problems for one for each student.  Multiple students could solve the same question.
  • Quality control video

Learning Activities:

WHO (T=Teacher Focus Lesson; WG=Whole Group\; SM=Small Group; I=Independent)

Learning Activity Task                                                WHO is responsible
for this step?
Approximate time
for task
Teacher will start the lesson by discussing the importance of quality control and checking your answers. Have students brainstorm types of jobs and why quality control would be important in that job. Teacher may used a video such as Quality control video to emphasize this point. T10 minutes
Each student will work on one problem that has multi-steps (a different problem for each student). They should complete the problem incorrectly, but work on making the error difficult to find easily.  They should also check their work.
I10 minutes
Students get into groups of 3-4 and trade papers.  Students will try to find where the original student went wrong.  Once they find the error, students will fix the problem. 
SG/I10 minutes
Once all students are done, each student will explain where the error occurred and how they changed it to find the correct answer.SG
15 minutes

Wrap up discussion on why is checking your work important.
WG5 minutes


  • Teacher will collect the papers that have been completed and check over what the students completed.
  • Exit ticket: List two ways that you will practice quality control this week.


Class discussion about why checking your work is important.

Extension Activity (for intervention or enrichment): 

  • Students could video their response and where they found the mistakes.
  • Differentiation: students could work in pairs to create an incorrect problem and find another pair to exchange and correct problems
  • Teacher could invite in a guest speaker to discuss quality control in a particular industry.
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