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.

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

CCSS.MATH.CONTENT.HSA.REI.A.1
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

Materials:

• 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

Assessment

• 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.

Wrap-Up:

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.