Unit 7, Lesson 10
Problem Solving with Perimeter and Area
Grade 3
Preparation
Lesson Purpose
The purpose of this lesson is for students to solve problems that involve both perimeter and area of rectangles in order to reinforce the difference between perimeter and area.
Lesson Narrative
In previous lessons, students learned what area is and how to find the area of rectangles and figures made up of rectangles. They also learned how to measure the perimeter of other shapes, solve problems that involved perimeter, and recognize situations in which perimeter is and is not relevant. By the end of this lesson, students confirm that while perimeter and area are both measurements that can appear together in problems, perimeter is a linear measurement while area is two-dimensional.
- Representation
- MLR1
- Determine the information needed to solve two-step word problems involving the area and perimeter of rectangles. Ask (orally) questions to elicit that information.
- Solve problems that involve perimeter and area of rectangles.
- Let’s solve problems involving perimeter and area.
Required Preparation
Activity 2
- Each group of 2 will need a copy of the 2 data and problem card sets. Keep set 1 separate from set 2.
Teacher Reflection Questions
What was the best question you asked students today? Why would you consider it the best one based on what students said or did?
Have a correction or suggestion?
Tell us about a typo, a broken link, or an improvement you’d like to see. We read every submission but can’t reply.
Have a question or need support instead? Visit our Contact Us page to reach our team.