Lesson 2

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

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.

• 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.

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?