# Lesson 2

How Many in Each Group?

### Lesson Purpose

The purpose of this lesson is for students to solve “how many in each group?” problems in a way that makes sense to them.

### Lesson Narrative

Previously, students solved “how many groups?” problems in a way that made sense to them. In this lesson students extend problems involving sharing into groups of equal size to include “how many in each group?” problems. Students again have the flexibility to represent and solve problems using any strategy that makes sense to them in this lesson. If students use connecting cubes, encourage them to draw a picture to match their work. At the end of this lesson, **division** is defined as finding the number of groups or finding the size of each group when we share into groups of equal size.

- Engagement

- MLR7

### Learning Goals

Teacher Facing

- Solve “how many in each group?” problems in a way that makes sense to them.

### Student Facing

- Let’s represent and solve more problems.

### Required Materials

Materials to Gather

### Required Preparation

Activity 3:

- Gather the 2–3 posters from the previous lesson and this lesson that highlight counting the groups in a “how many groups?” problem and finding how many in each group in a “how many in each group?” problem.

### Lesson Timeline

Warm-up | 10 min |

Activity 1 | 15 min |

Activity 2 | 10 min |

Activity 3 | 10 min |

Lesson Synthesis | 10 min |

Cool-down | 5 min |

### Teacher Reflection Questions

What did you say, do, or ask during the lesson synthesis that helped students be clear on the learning of the day? How did understanding the cool-down of the lesson before you started teaching today help you synthesize that learning?

### Suggested Centers

- Rectangle Rumble (3–5), Stage 2: Factors 1–5 (Supporting)
- Five in a Row: Multiplication (3–5), Stage 2: Factors 1–9 (Supporting)