# Lesson 15

Explain How You Counted

### Lesson Purpose

The purpose of this lesson is for students to count collections of objects. The focus is for students to show and explain how they counted to a partner.

### Lesson Narrative

In the Questions About Us routine, students brainstorm different ways to represent how many students are at school today. Students then count objects in different collections in a way that makes sense to them and share how they counted the collection with a partner. The second activity is an optional activity that provides support in matching each object with one number.

• Representation
• MLR8

### Learning Goals

Teacher Facing

• Count collections of objects.
• Explain how they counted to a partner.

### Student Facing

• Let’s count collections of objects and tell our partners how we counted.

### Required Materials

Materials to Gather

### Required Preparation

Activity 3:

• Gather materials from:
• Connecting Cubes, Stages 1, 2, and 3
• Pattern Blocks, Stages 1, 2, and 3
• Geoblocks, Stages 1 and 2
• Picture Books, Stages 1 and 2

Building Towards

### Lesson Timeline

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

### Teacher Reflection Questions

Who got to do math today in class and how do you know? Identify the norms or routines that allowed those students to engage in mathematics. How can you adjust these norms and routines so all students do math tomorrow?