Lesson 20
A Trip to the Zoo
Lesson Purpose
The purpose of this lesson is for students to solve story problems with three addends.
Lesson Narrative
In this lesson, students solve story problems that call for addition of three numbers. Students solve the problems in any way that makes sense to them. Students may work flexibly with different methods based on the numbers they are adding.
- Action and Expression
- MLR6
Learning Goals
Teacher Facing
- Solve story problems with three addends.
Student Facing
- Let’s solve story problems.
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
What student thinking was made visible through representations and discussion today? What thinking was still invisible? How might you make that thinking visible in future lessons?