Unit 5, Lesson 16
Compare Perimeters of Rectangles
Grade 4
Preparation
Lesson Purpose
The purpose of this lesson is for students to apply multiplicative reasoning and their knowledge of fractions to solve problems about perimeters of rectangles.
Lesson Narrative
This lesson reinforces students’ understanding of the relationship between the side lengths and the perimeter of a rectangle, and their ability to reason multiplicatively in a geometric context.
- Action and Expression
- MLR8
- Determine the perimeter and the side lengths of rectangles.
- Use multiplication to compare the perimeters of rectangles.
- Let’s solve problems about rectangles of different sizes.
Required Materials
Activity 1
Activity 2
Activity 3
Required Preparation
Activity 2
- Each group of 2 students needs a 12-inch chenille stem, an inch ruler, and tape.
Teacher Reflection Questions
What evidence do you have that students' ideas about perimeter shifted or broadened as a result of this lesson?
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.