Lesson 3
Thousandths in Expanded Form
Lesson Purpose
The purpose of this lesson is for students to represent decimals to the thousandths place in expanded form.
Lesson Narrative
The previous lesson introduced students to different ways of thinking about a decimal number, including by place value. The goal of this lesson is for students to make connections between familiar representations of decimals, such as grids or numerical form, and expanded form. Students have seen expanded form of whole numbers in a previous course and apply the same idea here to write expressions showing how many of each decimal place value is in a number. This sets students up for work in a future unit considering the relationship between place values.
Learning Goals
Teacher Facing
- Relate different representations of the same number.
- Write decimals in expanded form.
Student Facing
- Let's represent thousandths.
Required Preparation
CCSS Standards
Addressing
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 20 min |
| Activity 2 | 15 min |
| Lesson Synthesis | 10 min |
| Cool-down | 5 min |
Teacher Reflection Questions
What unfinished learning or misunderstandings do your students have about the relationship between place values? How did you leverage those misconceptions in a positive way to further the understanding of the class?
Suggested Centers
- Mystery Number (1–4), Stage 5: Six-digit Numbers (Supporting)
- Get Your Numbers in Order (1–5), Stage 4: Denominators 2, 3, 4, 5, 6, 8, 10, 12, or 100 (Supporting)