# Contents

1. Section A: Features of Patterns
1. Warm-up: Notice and Wonder: Sets of Circles
2. 1.1: Bottle Cap Patterns
3. 1.2: Taller and Taller
1. Warm-up: How Many Do You See: Colorful Tiles
2. 2.1: Patterns that Repeat
3. 2.2: Numbered Patterns
4. 2.3: Clare’s Pattern
1. Warm-up: Number Talk: Patterns in Multiplication
2. 3.1: Growing Rectangles
3. 3.2: More Growing Rectangles
4. 3.3: No Grid This Time!
1. Warm-up: Which One Doesn’t Belong: Stacked Squares
2. 4.1: Count by 10 and by 9
3. 4.2: Count by 99
4. 4.3: Count by 15
5. Section A Summary
6. Section A Practice Problems
2. Section B: Multi-digit Multiplication
1. Warm-up: Number Talk: A Number Times Some Multiple of 10
2. 5.1: Elena’s Sticky Gift
3. 5.2: More and More Stickers
1. Warm-up: Notice and Wonder: With and Without a Grid
2. 6.1: Tyler's Diagrams
3. 6.2: Two Kinds of Diagrams
1. Warm-up: Estimation Exploration: Mysterious Area
2. 7.1: Larger Numbers to Multiply
3. 7.2: Jada’s Errors
1. Warm-up: Number Talk: Extra Groups
2. 8.1: Two by Two
3. 8.2: Decompose by Place Value
1. Warm-up: Which One Doesn’t Belong: Expressions Galore
2. 9.1: An Algorithm for Noah
3. 9.2: Try an Algorithm with Partial Products
1. Warm-up: Number Talk: Products
2. 10.1: Partial Products, Recorded
3. 10.2: Han’s Multiplication Mishap
1. Warm-up: Number Talk: The Value of the Digits
2. 11.1: Two Algorithms to Multiply
3. 11.2: Algorithm Comparison
1. Warm-up: What Do You Know About 1 Year?
2. 12.1: Time Flies When We Leap Years
3. 12.2: Coin Collection
4. Section B Summary
5. Section B Practice Problems
3. Section C: Multi-digit Division
1. Warm-up: Estimation Exploration: Lots of Paletas
2. 13.1: Paletas for a Class Party
3. 13.2: More Snacks for a Class Party
1. Warm-up: Number Talk: Dividing by 7
2. 14.1: Write Multiples
3. 14.2: Jada’s Mystery Number
1. Warm-up: Estimation Exploration: Area of a Soccer Field
2. 15.1: Elena’s Mural
3. 15.2: Tyler’s Mural
1. Warm-up: What Do You Know About Base-ten Blocks?
2. 16.1: Blocks to Divide
3. 16.2: Show Us Your Blocks
1. Warm-up: Which One Doesn’t Belong: Base-ten Diagrams
2. 17.1: Divide with Diagrams or Blocks
3. 17.2: Help Noah Get Unstuck
1. Warm-up: Number Talk: Divide by 3
2. 18.1: Decompose Dividends
3. 18.2: Tyler’s Method
1. Warm-up: Notice and Wonder: Equations with Hundreds
2. 19.1: A Stack of Partial Quotients
3. 19.2: Andre and Elena’s Work
4. 19.3: Incomplete Calculations
1. 20.1: Muffins and Seats
2. 20.2: Save for a Garden
3. Section C Summary
4. Section C Practice Problems
4. Section D: Let’s Put It to Work: Problem Solving with Large Numbers
1. Warm-up: Which One Doesn’t Belong: Expressions with 5 or 90
2. 21.1: Going on a Field Trip
3. 21.2: A Trip to the Movies
1. Warm-up: How Many Do You See: Shaded Squares
2. 22.1: Create a Class Banner
3. 22.2: Replace the Classroom Carpet
1. Warm-up: True or False: Differences
2. 23.1: Back and Forth
3. 23.2: Fitness Challenge
1. Warm-up: Notice and Wonder: Native American Languages
2. 24.1: Do You Speak Navajo?
3. 24.2: Languages in Philadelphia and Chicago
4. Section D Summary
1. Warm-up: How Many Do You See: Paper Flowers
2. 25.1: Paper Flower Construction
3. 25.2: Quinceañera Decorations
4. 25.3: Make Your Own Problems
5. Section D Practice Problems
5. Glossary
1. Image Attributions
6. Citations
7. Notes
8. Notes