Lesson 15
Number Talk
Lesson Purpose
Lesson Narrative
This lesson provides an opportunity to observe the ways in which students make use of structure and repeated reasoning to design a Number Talk. The warm-up is followed by four Number Talk activities. In the first activity, students are given three expressions and asked to write the missing expression. In each of the subsequent activities, one additional expression is missing. In the last activity, students write all four expression of a Number Talk.
It is not essential that students complete all four activities. Decide which activities to do based on how much scaffolding students may need. The lesson may take more than one day, especially if students facilitate their Number Talk with other groups.
If students need additional support with the concepts in this lesson, refer back to Unit 3, Sections A and B in the curriculum materials.
- Action and Expression
- MLR8
Learning Goals
Teacher Facing
- Apply understanding of addition and subtraction within 1,000 to create a Number Talk activity.
Student Facing
- Let’s create a Number Talk activity.
Required Preparation
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 15 min |
| Activity 2 | 15 min |
| Activity 3 | 15 min |
| Activity 4 | 15 min |
| Lesson Synthesis | 10 min |
| Cool-down | 5 min |