Unit 6, Lesson 23
Problems about Perimeter and Area
Grade 4
Preparation
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
- Explain (orally and using words or other representations) strategies for solving multi-step problems involving measurement conversions, perimeter, and area.
- Let’s solve situations involving perimeter and area.
Required Materials
Activity 1
Required Preparation
None
Teacher Reflection Questions
Some problems in the lesson can reveal the depth of students’ understanding of multiplication and division, the flexibility of their thinking, and their ability to make use of structure. What evidence of flexible reasoning, structural thinking, or deep understanding did you see today?