## Section A: Add and Subtract Within 20

### Lesson 1: Add and Subtract Within 10

### Lesson 2: Relate Addition and Subtraction within 10

### Lesson 3: Relate Addition and Subtraction within 20

### Lesson 4: Add and Subtract Your Way

### Lesson 5: Add Within 50

### Lesson 6: Center Day 1

## Section B: Ways to Represent Data

### Lesson 7: Collect and Represent Data

### Lesson 8: Interpret Picture Graphs

### Lesson 9: Interpret Bar Graphs

### Lesson 10: Represent Data Using Picture Graphs and Bar Graphs

### Lesson 11: Questions About Data

### Lesson 12: Center Day 2