Lesson 5
Explore Addition and Subtraction
Lesson Purpose
The purpose of this lesson is for students to add and subtract within 10.
Lesson Narrative
Students add and subtract in a way that makes sense to them as they learn a new stage of the center, Check it Off, and then choose from other center activities introduced in previous lessons. They may use their knowledge of the counting sequence, count all, count on, or count back to find the sum or difference. This lesson provides an opportunity to collect formative assessment data on how students are developing methods for adding and subtracting within 10 that build toward fluency.
Math Community
In the lesson synthesis, students use their Mathematical Community poster to create norms for the classroom.
- Action and Expression
- MLR8
Activity 1: Introduce Check it Off, Subtract within 10
Learning Goals
Teacher Facing
- Add and subtract within 10 in a way that makes sense to them.
Student Facing
- Let’s add and subtract.
Required Materials
Materials to Gather
Materials to Copy
- Check It Off Stage 2 Recording Sheet
Required Preparation
Activity 1:
- Each group of 2 needs a set of Number Cards 0-10.
Activity 2:
- Gather materials from previous centers:
- Counting Collections, Stage 1
- Number Race, Stage 3
- Check it Off, Stages 1 and 2
- Five in a Row: Addition and Subtraction, Stages 1 and 2
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 20 min |
| Activity 2 | 20 min |
| Lesson Synthesis | 10 min |
| Cool-down | 0 min |