Contents

1. Section A: The Structure of the Number Line
2. Lesson 1: Whole Numbers on 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
3. Lesson 2: Features of a Number Line
   1. 2.2: Analyze Number Lines
4. Lesson 3: Unlabeled Tick Marks
   1. Warm-up: Notice and Wonder: From 0 to 30
   2. 3.1: Locate the Numbers
   3. 3.2: Are You Missing Something?
5. Lesson 4: Compare Numbers on a Number Line
   1. Warm-up: Number Talk: Subtract Fives
   2. 4.1: Compare the Numbers
   3. 4.2: Compare Larger Numbers
6. Lesson 5: Estimate on a Number LIne
   1. Warm-up: Estimation Exploration: What Number?
   2. 5.1: Estimate the Numbers
   3. 5.2: Order the Numbers
   4. Section A Summary
7. Lesson 6: Center Day 1
   1. Warm-up: Number Talk: Decompose and Subtract
   2. 6.2: Centers: Choice Time
   3. Section A Practice Problems
8. Section B: Add and Subtract on a Number Line
9. Lesson 7: Addition and Subtraction on the Number Line
   1. Warm-up: Notice and Wonder: Jumps on the Number Line
   2. 7.1: Add and Subtract
   3. 7.2: Number Lines and Equations
10. Lesson 8: Equations on a Number Line
    1. 8.1: Represent Equations
    2. 8.2: Write Equations
11. Lesson 9: The Difference Between Numbers
    1. Warm-up: Number Talk: Add To
    2. 9.1: Add or Subtract
    3. 9.2: Different Ways to Find the Difference
12. Lesson 10: Place Value and the Number Line
    1. Warm-up: Notice and Wonder: Base-ten and the Number Line
    2. 10.1: Compare Representations
    3. 10.2: On the Number Line
13. Lesson 11: Different Ways to Add and Subtract
    1. Warm-up: Number Talk: Use Tens
    2. 11.1: Compare Methods
    3. 11.2: More Methods
14. Lesson 12: Equations with Unknowns
    1. Warm-up: True or False: Making Tens
    2. 12.1: Number Line Riddles
    3. 12.2: Make the Equations True
15. Lesson 13: Represent Story Problems
    1. Warm-up: Notice and Wonder: Compare Representations
    2. 13.2: All Kinds of Representations
    3. Section B Summary
16. Lesson 14: Center Day 2
    1. Warm-up: True or False: Is This 50?
    2. 14.2: Centers: Choice Time
17. Lesson 15: Riddles
    1. Warm-up: Notice and Wonder: Birthday Candles
    2. 15.1: Kiran’s Age Riddles
    3. 15.2: Write Riddles
    4. Section B Practice Problems
18. Glossary
19. Attributions
    1. Image Attributions
20. Notes
21. Notes