# 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

Building Towards

### 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?