Lesson 14
Center Day 2
Lesson Purpose
The purpose of this lesson is for students to practice adding and subtracting within 20.
Lesson Narrative
Students learn a new stage in the Number Puzzles center and then choose from previously introduced centers, focusing on adding and subtracting within 20.
- Action and Expression
- MLR8
Learning Goals
Teacher Facing
- Add and subtract within 20.
Student Facing
- Let’s play games to practice adding and subtracting.
Required Materials
Materials to Gather
Materials to Copy
- Number Puzzles Addition and Subtraction Stage 2 Gameboard
Required Preparation
Activity 1:
- Each group of 2 needs one set of Number Puzzle Digit Cards from stage 1 of this center.
Activity 2:
- Gather materials from previous centers:
- Number Puzzles, Stages 1 and 2
- Shake and Spill, Stages 3-5
- Compare, Stage 1
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 15 min |
| Activity 2 | 25 min |
| Lesson Synthesis | 10 min |
Teacher Reflection Questions
Identify something you thought was going to go well in math class recently, but did not. What can you do to make it a success next time?