# Contents

1. Section A: The Structure of the Number Line
1. Warm-up: Notice and Wonder: Rulers and Number Lines
2. 1.1: What is a Number Line?
3. 1.2: Make Your Own Number Line
1. 2.2: Analyze Number Lines
1. Warm-up: Notice and Wonder: From 0 to 30
2. 3.1: Locate the Numbers
3. 3.2: Are You Missing Something?
1. Warm-up: Number Talk: Subtract Fives
2. 4.1: Compare the Numbers
3. 4.2: Compare Larger Numbers
1. Warm-up: Estimation Exploration: What Number?
2. 5.1: Estimate the Numbers
3. 5.2: Order the Numbers
4. Section A Summary
1. Warm-up: Number Talk: Decompose and Subtract
2. 6.2: Centers: Choice Time
3. Section A Practice Problems
2. Section B: Add and Subtract on a Number Line
1. Warm-up: Notice and Wonder: Jumps on the Number Line
3. 7.2: Number Lines and Equations
1. 8.1: Represent Equations
2. 8.2: Write Equations
1. Warm-up: Number Talk: Add To
3. 9.2: Different Ways to Find the Difference
1. Warm-up: Notice and Wonder: Base-ten and the Number Line
2. 10.1: Compare Representations
3. 10.2: On the Number Line
1. Warm-up: Number Talk: Use Tens
2. 11.1: Compare Methods
3. 11.2: More Methods
1. Warm-up: True or False: Making Tens
2. 12.1: Number Line Riddles
3. 12.2: Make the Equations True
1. Warm-up: Notice and Wonder: Compare Representations
2. 13.2: All Kinds of Representations
3. Section B Summary
1. Warm-up: True or False: Is This 50?
2. 14.2: Centers: Choice Time
1. Warm-up: Notice and Wonder: Birthday Candles
2. 15.1: Kiranâ€™s Age Riddles
3. 15.2: Write Riddles
4. Section B Practice Problems
3. Glossary