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| Chapter 1: Numbers to 10,000 |
| Lesson 1.1: Counting to 10,000 |
| Lesson 1.2: Place Value |
| Lesson 1.3: Comparing and Ordering Numbers |
| Lesson 1.4: Rounding Numbers to the Nearest Ten |
| Lesson 1.5: Rounding Numbers to the Nearest Hundred |
| Chapter 2: Addition Within 10,000 |
| Lesson 2.1: Addition Problems |
| Lesson 2.2: Mental Addition |
| Lesson 2.3: Adding Fluently Within 1,000 |
| Lesson 2.4: Adding Without Regrouping |
| Lesson 2.5: Adding with Regrouping |
| Lesson 2.6: Real-world Problems: Addition |
| Chapter 3: Subtraction Within 10,000 |
| Lesson 3.1: Mental Subtraction |
| Lesson 3.2: Subtracting Fluently Within 1,000 |
| Lesson 3.3: Subtracting Without Regrouping |
| Lesson 3.4: Subtracting with Regrouping |
| Lesson 3.5: Real-world Problems: Subtraction |
| Chapter 4: Multiplication Tables |
| Lesson 4.1: Multiplying by 6 |
| Lesson 4.2: Multiplying by 7 |
| Lesson 4.3: Multiplying by 8 |
| Lesson 4.4: Multiplying by 9 |
| Lesson 4.5: Multiplying by 11 |
| Lesson 4.6: Multiplying by 12 |
| Lesson 4.7: Multiplication Patterns |
| Lesson 4.8: Dividing using Multiplication Facts |
| Chapter 5: Multiplication |
| Lesson 5.1: Multiplying using Models |
| Lesson 5.2: Multiplying Without Regrouping |
| Lesson 5.3: Multiplying with Regrouping |
| Chapter 6: Using Bar Models: The Four Operations |
| Lesson 6.1: Real-World Problems: Multiplication |
| Lesson 6.2: Real-World Problems: Division |
| Lesson 6.3: Real-World Problems: Four Operations |
| Chapter 7: Fractions |
| Lesson 7.1: Understanding Unit Fractions |
| Lesson 7.2: Fractions as Part of a Whole |
| Lesson 7.3: Fractions as Part of a Set |
| Lesson 7.4: Understanding Equivalent Fractions |
| Lesson 7.5: Comparing Fractions |
| Chapter 8: Measurement |
| Lesson 8.1: Mass: Kilograms and Grams |
| Lesson 8.2: Liquid Volume: Liters and Milliliters |
| Lesson 8.3: Real-World Problems: One-Step Problems |
| Chapter 9: Area and Perimeter |
| Lesson 9.1: Area |
| Lesson 9.2: Square Units (cm2 and in2) |
| Lesson 9.3: Square Units (m2 and ft2) |
| Lesson 9.4: Perimeter and Area |
| Lesson 9.5: More Perimeter |
| Chapter 10: Time |
| Lesson 10.1: Telling Time |
| Lesson 10.2: Converting Hours and Minutes |
| Lesson 10.3: Elapsed Time |
| Chapter 11: Graphs and Line Plots |
| Lesson 11.1: Making Picture Graphs with Scales |
| Lesson 11.2: Making Bar Graphs with Scales |
| Lesson 11.3: Reading and Interpreting Bar Graphs |
| Lesson 11.4: Line Plots and Estimation |
| Chapter 12: Angles, Lines, and Two-Dimensional Figure |
| Lesson 12.1: Introducing Angles |
| Lesson 12.2: Introducing Perpendicular and Parallel Lines |
| Lesson 12.3: Polygons |