- 1.1: Number Talk: Size of Dividend and Divisor
- 1.2: All Stacked Up
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- Lesson 1 Summary
- Lesson 1 Practice Problems

- 2.1: A Division Expression
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- 2.3: Homemade Jams
- Lesson 2 Summary
- Lesson 2 Practice Problems

- 3.1: How Many of These in That?
- 3.2: Representing Groups of Fractions with Tape Diagrams
- 3.3: Finding Number of Groups
- Lesson 3 Summary
- Lesson 3 Practice Problems

- 4.1: Estimating a Fraction of a Number
- 4.2: Fractions of Ropes
- 4.3: Fractional Batches of Ice Cream
- Lesson 4 Summary
- Lesson 4 Practice Problems

- 5.1: Inventing a Situation
- 5.2: How Much in One Batch?
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- Lesson 5 Summary
- Lesson 5 Practice Problems

- 6.1: Number Talk: Greater Than 1 or Less Than 1?
- 6.2: Two Water Containers
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- 6.4: Inventing Another Situation
- Lesson 6 Summary
- Lesson 6 Practice Problems

- 7.1: Multiplying Fractions
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- 7.3: Dividing a Fraction by a Fraction
- Lesson 7 Summary
- Glossary
- Lesson 7 Practice Problems

- 8.1: Number Talk: Dividing by Half as Much
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- 8.3: A Train is Traveling at . . .
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- Lesson 8 Summary
- Glossary
- Lesson 8 Practice Problems

- 9.1: Number Talk: Multiplication Strategies
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- 9.3: How Many Times as Tall or as Far?
- 9.4: Comparing Paper Rolls
- Lesson 9 Summary
- Lesson 9 Practice Problems

- 10.1: Areas of Squares
- 10.2: How Many Would it Take? (Part 2)
- 10.3: Bases and Heights of Triangles
- Lesson 10 Summary
- Lesson 10 Practice Problems

- 11.1: A Box of Cubes
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- 11.3: Cubes with Fractional Edge Lengths
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- Lesson 11 Summary
- Lesson 11 Practice Problems

- 12.1: Operations with Fractions
- 12.2: Situations with \frac34 and \frac12
- 12.3: Pairs of Problems
- 12.4: Baking Cookies
- Lesson 12 Summary
- Lesson 12 Practice Problems

- 13.1: Snacks from the Concession Stand
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- Lesson 13 Summary
- Lesson 13 Practice Problems

- 14.1: Do the Zeros Matter?
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- Are you ready for more?

- Lesson 14 Summary
- Lesson 14 Practice Problems

- 15.1: The Cost of a Photo Print
- 15.2: Calculating Sums
- 15.3: Decimals All Around
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- Lesson 15 Summary
- Lesson 15 Practice Problems

- 16.1: Multiplying by 10
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- 16.3: Using Properties to Reason about Multiplication
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- Lesson 16 Summary
- Lesson 16 Practice Problems

- 17.1: Number Talk: Twenty Times a Number
- 17.2: Using the Partial Products Method
- 17.3: Calculating Products of Decimals
- Are you ready for more?

- Lesson 17 Summary
- Lesson 17 Practice Problems

- 18.1: Using Base-Ten Diagrams to Calculate Quotients
- 18.2: Using the Partial Quotients Method to Calculate Quotients
- 18.3: Lin Uses Long Division
- 18.4: Dividing Whole Numbers
- Lesson 18 Summary
- Glossary
- Lesson 18 Practice Problems

- 19.1: Keep Dividing
- 19.2: Using Long Division to Calculate Quotients
- Are you ready for more?

- Lesson 19 Summary
- Lesson 19 Practice Problems

- 20.1: Number Talk: Dividing by 4
- 20.2: Dividends and Divisors
- Are you ready for more?

- 20.4: Practicing Division with Decimals
- Lesson 20 Summary
- Lesson 20 Practice Problems

- 21.1: Close Estimates
- 21.2: Applying Division with Decimals
- 21.3: Distance between Hurdles
- 21.4: Examining a Tennis Court
- Lesson 21 Summary
- Lesson 21 Practice Problems

- 22.1: Determining Shipping Costs (Part 1)
- 22.2: Determining Shipping Costs (Part 2)
- 22.3: Determining Shipping Costs (Part 3)

- 23.1: Folding Paper Boxes
- 23.2: Sizing Up Paper Boxes

- Lesson 1: Size of Divisor and Size of Quotient
- Lesson 2: Meanings of Division
- Lesson 3: How Many Groups?
- Lesson 4: What Fraction of a Group?
- Lesson 5: How Much in Each Group? (Part 1)
- Lesson 6: How Much in Each Group? (Part 2)
- Lesson 7: Finding an Algorithm for Dividing Fractions
- Lesson 8: Ratios and Rates With Fractions
- Lesson 9: Fractional Lengths
- Lesson 10: Rectangles and Triangles with Fractional Lengths
- Lesson 11: Volume of Prisms
- Lesson 12: Solving Problems Involving Fractions
- Lesson 13: Using Decimals in a Shopping Context
- Lesson 14: Using Diagrams to Represent Addition and Subtraction
- Lesson 15: Adding and Subtracting Decimals
- Lesson 16: Methods for Multiplying Decimals
- Lesson 17: Calculating Products of Decimals
- Lesson 18: Using Long Division
- Lesson 19: Dividing Numbers that Result in Decimals
- Lesson 20: Dividing Decimals by Decimals
- Lesson 21: Using Operations on Decimals to Solve Problems
- Lesson 22: Fitting Boxes into Boxes
- Lesson 23: Making and Measuring Boxes
- 1.1: Which Diagram is Which?
- 1.2: Match Equations and Tape Diagrams
- Are you ready for more?

- Lesson 1 Summary
- Lesson 1 Practice Problems

- 2.1: Three Letters
- 2.2: Storytime
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- Lesson 2 Summary
- Glossary
- Lesson 2 Practice Problems

- 3.1: Hanging Around
- 3.2: Match Equations and Hangers
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- Lesson 3 Summary
- Lesson 3 Practice Problems

- 4.1: Number Talk: Subtracting From Five
- 4.2: Row Game: Solving Equations Practice
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- Lesson 4 Summary
- Lesson 4 Practice Problems

- 5.1: Recalling Ways of Solving
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- 5.3: Storytime Again
- Lesson 5 Summary
- Lesson 5 Practice Problems

- 6.1: Algebra Talk: When x is 6
- 6.2: Lemonade Sales and Heights
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- Lesson 6 Summary
- Lesson 6 Practice Problems

- 7.1: Number Talk: Percentages
- 7.2: Representing a Percentage Problem with an Equation
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- Lesson 7 Summary
- Lesson 7 Practice Problems

- 8.1: Algebra Talk: Solving Equations by Seeing Structure
- 8.2: Using Diagrams to Show That Expressions are Equivalent
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- Lesson 8 Summary
- Glossary
- Lesson 8 Practice Problems

- 9.1: Number Talk: Ways to Multiply
- 9.2: Ways to Represent Area of a Rectangle
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- Lesson 9 Summary
- Glossary
- Lesson 9 Practice Problems

- 10.1: Possible Areas
- 10.2: Partitioned Rectangles When Lengths are Unknown
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- Lesson 10 Summary
- Lesson 10 Practice Problems

- 11.1: Perfect Squares
- 11.2: Building with 32 Cubes
- 11.3: Perfect Cubes
- Are you ready for more?

- Lesson 11 Summary
- Glossary
- Lesson 11 Practice Problems

- 12.1: Exponent Review
- 12.2: The Net of a Cube
- 12.3: Every Cube in the Whole World
- Lesson 12 Summary
- Lesson 12 Practice Problems

- 13.1: Notice and Wonder: Dots and Lines
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- 13.3: Make 81
- Lesson 13 Summary
- Lesson 13 Practice Problems

- 14.1: Which One Doesn’t Belong: Twos
- 14.2: Is the Equation True?
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- Lesson 14 Summary
- Lesson 14 Practice Problems

- 15.1: Revisiting the Cube
- 15.2: Calculating Surface Area
- Are you ready for more?

- Lesson 15 Summary
- Lesson 15 Practice Problems

- 16.1: Up or Down?
- 16.2: What's the Value?
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- Lesson 16 Summary
- Lesson 16 Practice Problems

- 17.1: Which One Would You Choose?
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- Lesson 17 Summary
- Glossary
- Lesson 17 Practice Problems

- 18.1: Walking to the Library
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- Lesson 18 Summary
- Glossary
- Lesson 18 Practice Problems

- 19.1: Matching Equations and Tables
- 19.2: Getting to Know an Equation
- 19.3: Sharing Your Equation with Others

- Lesson 1: Tape Diagrams and Equations
- Lesson 2: Truth and Equations
- Lesson 3: Staying in Balance
- Lesson 4: Practice Solving Equations and Representing Situations with Equations
- Lesson 5: A New Way to Interpret a over b
- Lesson 6: Write Expressions Where Letters Stand for Numbers
- Lesson 7: Revisit Percentages
- Lesson 8: Equal and Equivalent
- Lesson 9: The Distributive Property, Part 1
- Lesson 10: The Distributive Property, Part 2
- Lesson 11: Squares and Cubes
- Lesson 12: Surface Area of a Cube
- Lesson 13: Meaning of Exponents
- Lesson 14: Expressions with Exponents
- Lesson 15: Evaluating Expressions with Exponents
- Lesson 16: Equivalent Exponential Expressions
- Lesson 17: Two Related Quantities, Part 1
- Lesson 18: Two Related Quantities, Part 2
- Lesson 19: Tables, Equations, and Graphs, Oh My!

- Glossary
- Image Attributions

- Notes
- Notes