# Lesson 21

Comparemos números

### Lesson Purpose

The purpose of this lesson is for students to compare numbers 1–10.

### Lesson Narrative

Students can compare numbers in any way that makes sense to them. Students may:

• create groups of objects or draw groups of images and match to compare.
• use the count sequence to compare.
• begin to automatically know which numbers are less or more than a given number.
• Action and Expression
• MLR8

### Learning Goals

Teacher Facing

• Compare numbers 1–10.

### Student Facing

• Descifremos cuál número es más y cuál es menos.

### Required Materials

Materials to Gather

Materials to Copy

• Number Mat 1-10

### Required Preparation

Activity 3:

• Gather materials from:
• Less, Same, More, Stages 1-4
• Math Libs, Stage 1
• Number Race, Stage 1

### Lesson Timeline

 Warm-up 10 min Activity 1 10 min Activity 2 15 min Activity 3 20 min Lesson Synthesis 5 min Cool-down 0 min

### Teacher Reflection Questions

As you finish up this unit, reflect on the norms and activities that have supported each student in learning math. List ways you have seen each student grow as a young mathematician throughout this work. List ways you have seen yourself grow as a teacher. What will you continue to do and what will you improve upon in Unit 3?