Lesson 1
Find the Largest Product
Lesson Purpose
The purpose of this lesson is for students to recognize and explain place
value patterns as they find products using the standard algorithm they learned in Unit 4.
Lesson Narrative
In previous units, students learned the standard algorithm for multiplying
whole numbers. In this lesson, students compare and contrast different products that can be made
with the same set of 3 or 4 digits. They look for patterns in the arrangement of the digits and
explain those patterns in terms of place value. For example, students might notice that the
product of 2 two-digit numbers results in a greater product than that of a three-digit number
and 1 one-digit number. If students need additional support with the concepts in this lesson,
refer back to Unit 4, Section A in the curriculum materials.
- Action and Expression
- MLR8
Activity 1: Talk About it
Learning Goals
Teacher Facing
-
Fluently multiply multi-digit whole numbers using the standard algorithm.
Student Facing
- Let’s look for patterns when we multiply multi-digit numbers.
Required Preparation
CCSS Standards
Addressing
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 15 min |
| Activity 2 | 20 min |
| Lesson Synthesis | 10 min |
| Cool-down | 5 min |
Teacher Reflection Questions
What did you learn about students' understanding of the standard algorithm
for multiplication during the lesson today? How can you use what you learned to support students
in tomorrow's lesson?