Unit 6, Lesson 13
Situations Involving Equal-Size Groups
Grade 4
Preparation
Lesson Narrative
In IM Grade 3, students learned about the relationship between multiplication and division and reasoned about division in terms of equal groups. They also saw two interpretations of division: as a way to find the size of a group and as a way to find the number of groups. They used these understandings to reason about division problems in context, and to find a whole-number quotient from a two-digit dividend and a one-digit divisor.
In this lesson, students make sense of a division context and relate it to expressions. Students have the opportunity to represent and solve the problems in a way that makes sense to them, which allows teachers to observe the knowledge and understanding students have.
- Action and Expression
- MLR2
- Explain (orally and in writing) strategies for solving “how many in each group” and “how many groups” problems within 100.
- Interpret (orally) division equations that represent “how many in each group” and “how many groups” problems.
- Let’s solve division problems.
Required Preparation
None
Teacher Reflection Questions
What surprised you about the reasoning and strategies students used during this lesson? What assumptions do you have about student ability that are evidenced by what surprised you?