- Section A: Reason with Fractions
- Warm-up: Number Talk: Fluency and Fractions
- 1.1: Let’s Make Head Wraps!
- 1.2: Make 2 Yards of Fabric
- 1.3: Play by the Rules

- Warm-up: Number Talk: Wholes and Units
- 2.1: Straws for A Roller Coaster
- 2.2: Tall Enough for a Ride?

- Warm-up: Number Talk: One Whole, Many Names
- 3.1: Relay Race at Recess
- 3.2: You Be the Author

- Section B: Whole-number Operations
- Warm-up: Number Talk: Differences
- 4.1: Lots of Zeros
- 4.2: Ways of Finding Differences

- Warm-up: Estimation Exploration: A Silly Riddle
- 5.1: Two Methods Revisited
- 5.2: Two by Two

- Warm-up: Number Talk: Divide by 3 and by 6
- 6.1: Unfinished Divisions
- 6.2: Where Do We Begin?

- Section C: Solve Problems with Multiplication and Division
- Warm-up: Notice and Wonder: Two Cities
- 7.1: The Most and Least Expensive
- 7.2: The Cost of Living

- Warm-up: Number Talk: Divide by 8
- 8.1: Two Truths and a Lie, or Two Lies and a Truth?
- 8.2: Buses for a Field Trip

- Warm-up: Number Talk: Difference and Thousands
- 9.1: What’s the Question?
- 9.2: What’s the Problem?

- Section D: Creation and Design
- Warm-up: Estimation Exploration: No Driver Required
- 10.1: Dental Care
- 10.2: Get Your Classmates to Estimate
- 10.3: Facilitate Your “Estimation Exploration” Activity

- Warm-up: Which One Doesn’t Belong: Strings of Numbers
- 11.1: Add One That Doesn’t Belong
- 11.2: Add Two That Don’t Belong
- 11.3: Add Three That Don’t Belong

- Warm-up: Number Talk: A Whole Number and a Fraction
- 12.1: Related Numbers, Related Expressions
- 12.2: Add One New Expression, Then Two
- 12.3: Add Three New Expressions

- Glossary
- Image Attributions

- Citations
- Notes
- Notes