Lesson 22
Problems About Perimeter and Area
Lesson Purpose
Lesson Narrative
This lesson prompts students to apply their reasoning skills and knowledge of all operations to solve problems about area and perimeter. Along the way, students also use multiplication and division to convert units of measurement. Most numbers used here are two- and three-digit numbers. The problems in the lesson may include more than one step and can be solved in multiple ways, offering students opportunities to construct logical arguments to communicate their thinking and to critique the reasoning of others (MP3). As students begin the lesson remind them of their past experiences with multi-step problems and explain that the problems in this lesson may involve more than one step.
- Representation
- MLR8
Activity 1: Create a Class Banner
Learning Goals
Teacher Facing
- Solve multi-step problems involving measurement conversions, perimeter, and area.
Student Facing
- Let’s solve situations involving perimeter and area.
Required Materials
Materials to Gather
Required Preparation
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 15 min |
| Activity 2 | 20 min |
| Lesson Synthesis | 10 min |
| Cool-down | 5 min |
Teacher Reflection Questions
Suggested Centers
- Compare (1–5), Stage 7: Multi-digit Operations (Addressing)
- Watch Your Remainder (4–5), Stage 1: One-digit Divisors (Addressing)