- Section A: What is Division?
- Warm-up: How Many Do You See: Apples
- 1.1: How Many Apples?
- 1.2: Gallery Walk: Apples in Boxes

- Warm-up: Notice and Wonder: More Apples
- 2.1: How Many Apples?
- 2.2: Gallery Walk
- 2.3: All the Apples

- Warm-up: Number Talk: The More Things Change...
- 3.1: Groups of Students
- 3.2: Elena’s Colored Pencils
- 3.3: Which Drawing Matches?

- Warm-up: Number Talk: More or Less?
- 4.1: Spinning Tops
- 4.2: Cars in Boxes
- 4.3: Stacks of Blocks

- Warm-up: Number Talk: What’s the Same?
- 5.1: Card Sort: All about Bugs
- 5.2: Solve a Buggy Problem
- Section A Summary
- Section A Practice Problems

- Section B: Relate Multiplication and Division
- Warm-up: Notice and Wonder: Missing Numbers
- 6.1: Equations about Onions
- 6.2: At the Farmers' Market

- Warm-up: How Many Do You See: Tens
- 7.1: Division Round Table
- 7.2: Sets of School Supplies

- Warm-up: Number Talk: Multiplication and Division
- 8.1: Card Sort: Multiplication
- 8.2: If I Know, Then I Know

- Warm-up: Notice and Wonder: Multiplication Table
- 9.1: Products in the Table
- 9.2: If I Know, Then I Know: Multiplication

- Warm-up: How Many Do You See: Squares
- 10.1: From Diagrams to Expressions
- 10.2: From Expressions to Diagrams

- Warm-up: Which One Doesn’t Belong: Multiplication in Many Forms
- 11.1: Mark, then Express
- 11.2: Card Sort: Different Expressions, Same Rectangle
- Section B Summary
- Section B Practice Problems

- Section C: Multiplying Larger Numbers
- Warm-up: Notice and Wonder: Tens
- 12.1: A Whole Lot of Dollars
- 12.2: Two Strategies

- Warm-up: Estimation Exploration: Multiply Teens
- 13.1: Problems with Teen Numbers
- 13.2: Gallery Walk: Problems with Teen Numbers

- Warm-up: Notice and Wonder: Seeing Groups
- 14.1: A Factor Greater than Ten
- 14.2: Ways to Represent

- Warm-up: Which One Doesn’t Belong: Rectangles
- 15.1: Equal Groups, Larger Numbers
- 15.2: Gallery Walk: Equal Groups, Larger Numbers

- Warm-up: Number Talk: Three Times Some Numbers
- 16.1: 4 \times 23 , Represented
- 16.2: Some Fine Products
- 16.3: Play Close to 100, Multiplication

- Warm-up: True or False: Multiply by 10
- 17.1: Questions about a Situation
- 17.2: Party Problems
- Section C Summary
- Section C Practice Problems

- Section D: Dividing Larger Numbers
- Warm-up: What Do You Know About Division?
- 18.1: Groups on a Field Trip
- 18.2: Bus Ride and Lunch Groups

- Warm-up: True or False: Ones, Tens, Twenties
- 19.1: Divide with Base-Ten Blocks
- 19.2: Different Ways to Show Division

- Warm-up: Number Talk: Multiplication and Division
- 20.1: Ways to Divide
- 20.2: How Would You Divide?
- 20.3: Compare, Divide within 100

- Warm-up: Notice and Wonder: Apples Again
- 21.1: Apple Adventure
- 21.2: Apple Days
- Section D Summary

- Warm-up: Notice and Wonder: Garden
- 22.1: Produce
- 22.2: Plan the Garden
- Section D Practice Problems

- Glossary
- Image Attributions

- Notes
- Notes