# Lesson 15

Build and Count with Solid Shapes

### Lesson Purpose

The purpose of this lesson is for students to build with solid shapes to reinforce counting and comparing concepts.

### Lesson Narrative

In previous lessons, students built with solid shapes and described what they built. In this lesson, students create towers, which requires them to consider the attributes of shapes as they determine which shapes stack easily.
• Engagement
• MLR8

### Learning Goals

Teacher Facing

• Compose solid shapes to build new shapes.
• Count to answer “how many” questions about groups of up to 20 objects.

### Student Facing

• Let’s build with and count solid shapes.

### Required Materials

Materials to Gather

### Required Preparation

Warm-up:

• Make a tower with 16 connecting cubes.

Activity 2:

• Each group of 4 students needs 6 cubes, 6 cylinders, and 6 cones.

Activity 3:

• Gather materials from:
• Build Shapes, Stages 1-3
• Geoblocks, Stages 1-4
• Counting Collections, Stage 1
• Match Mine, Stages 1 and 2
• Shake and Spill, Stages 1-4

Building Towards

### 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

How are students working together during centers? Are all students getting the opportunity to participate in the mathematics?