Unit 5, Lesson 16
Compare Perimeters of Rectangles
Grade 4
Preparation
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
- 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?