Contents

1. Section A: Reason with Fractions
2. Lesson 1: Add, Subtract, and Multiply Fractions
   1. Warm-up: Number Talk: Fluency and Fractions
   2. 1.1: Let’s Make Head Wraps!
   3. 1.2: Make 2 Yards of Fabric
   4. 1.3: Play by the Rules
3. Lesson 2: Sums and Differences of Fractions
   1. Warm-up: Number Talk: Wholes and Units
   2. 2.1: Straws for A Roller Coaster
   3. 2.2: Tall Enough for a Ride?
4. Lesson 3: Stories with Fractions
   1. Warm-up: Number Talk: One Whole, Many Names
   2. 3.1: Relay Race at Recess
   3. 3.2: You Be the Author
5. Section B: Whole-number Operations
6. Lesson 4: Another Look at the Standard Algorithm
   1. Warm-up: Number Talk: Differences
   2. 4.1: Lots of Zeros
   3. 4.2: Ways of Finding Differences
7. Lesson 5: Multiplication of Multi-digit Numbers
   1. Warm-up: Estimation Exploration: A Silly Riddle
   2. 5.1: Two Methods Revisited
   3. 5.2: Two by Two
8. Lesson 6: What’s the Quotient?
   1. Warm-up: Number Talk: Divide by 3 and by 6
   2. 6.1: Unfinished Divisions
   3. 6.2: Where Do We Begin?
9. Section C: Solve Problems with Multiplication and Division
10. Lesson 7: Solve Multiplicative Comparison Problems
    1. Warm-up: Notice and Wonder: Two Cities
    2. 7.1: The Most and Least Expensive
    3. 7.2: The Cost of Living
11. Lesson 8: Solve Problems with Multiplication and Division
    1. Warm-up: Number Talk: Divide by 8
    2. 8.1: Two Truths and a Lie, or Two Lies and a Truth?
    3. 8.2: Buses for a Field Trip
12. Lesson 9: Create Word Problems
    1. Warm-up: Number Talk: Difference and Thousands
    2. 9.1: What’s the Question?
    3. 9.2: What’s the Problem?
13. Section D: Creation and Design
14. Lesson 10: Estimation Exploration
    1. Warm-up: Estimation Exploration: No Driver Required
    2. 10.1: Dental Care
    3. 10.2: Get Your Classmates to Estimate
    4. 10.3: Facilitate Your “Estimation Exploration” Activity
15. Lesson 11: Which One Doesn’t Belong?
    1. Warm-up: Which One Doesn’t Belong: Strings of Numbers
    2. 11.1: Add One That Doesn’t Belong
    3. 11.2: Add Two That Don’t Belong
    4. 11.3: Add Three That Don’t Belong
16. Lesson 12: Number Talk
    1. Warm-up: Number Talk: A Whole Number and a Fraction
    2. 12.1: Related Numbers, Related Expressions
    3. 12.2: Add One New Expression, Then Two
    4. 12.3: Add Three New Expressions
17. Glossary
18. Attributions
    1. Image Attributions
19. Citations
20. Notes
21. Notes