Lesson 1
Make 2 Parts
Lesson Purpose
The purpose of this lesson is for students to compose and decompose numbers up to 9 and understand that numbers can be composed and decomposed in more than one way.
Lesson Narrative
In the first activity, students identify that the total number of connecting cubes stays the same when decomposed into 2 parts. In the second activity, students discuss that the same number of objects can be decomposed into 2 parts in more than one way.
- Action and Expression
- MLR8
Learning Goals
Teacher Facing
- Compose and decompose numbers up to 9.
- Understand that numbers can be decomposed into parts in different ways.
Student Facing
- Let’s break numbers up into parts.
Required Materials
Materials to Gather
Materials to Copy
- Check It Off Stage 1 Recording Sheet Kindergarten
Required Preparation
Activity 1:
- Each student needs 6 connecting cubes.
Activity 3:
- Gather materials from:
- Find the Value of Expressions, Stage 1
- Bingo, Stages 1–3
- Shake and Spill, Stages 1–3
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 10 min |
| Activity 2 | 10 min |
| Activity 3 | 25 min |
| Lesson Synthesis | 5 min |
| Cool-down | 0 min |
Teacher Reflection Questions
What was the best question you asked students today? Why would you consider it the best one based on what students said or did?