Lesson 1

Hagamos 2 partes

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

  • Separemos números en partes.

Required Materials

Materials to Gather

Materials to Copy

  • Check It Off Stage 1 Recording Sheet Kindergarten, Spanish

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

CCSS Standards


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?

Print Formatted Materials

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Student Task Statements pdf docx
Lesson Cover Page pdf docx
Teacher Guide Log In
Teacher Presentation Materials pdf docx
Blackline Masters zip