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| Chapter 1: Numbers to 1,000 |
| Lesson 1.1: Counting to 1,000 |
| Lesson 1.2: Place Value |
| Lesson 1.3: Comparing and Ordering Numbers |
| Lesson 1.4: Number Patterns |
| Chapter 2: Addition Within 1,000 |
| Lesson 2.1: Adding Fluently Within 100 |
| Lesson 2.2: Adding Without Regrouping |
| Lesson 2.3: Adding with Regrouping in Ones |
| Lesson 2.4: Adding with Regrouping in Tens |
| Lesson 2.5: Adding with Regrouping in Ones and Tens |
| Lesson 2.6: Adding Four 2-Digit Numbers |
| Chapter 3: Subtraction Within 1,000 |
| Subtraction Within 1,000 |
| Lesson 3.1: Subtracting Fluently Within 100 |
| Lesson 3.2: Subtracting Without Regrouping |
| Lesson 3.3: Subtracting with Regrouping in Tens and Ones |
| Lesson 3.4: Subtracting with Regrouping in Hundreds and Tens |
| Lesson 3.5: Subtracting with Regrouping in Hundreds, Tens, and Ones |
| Lesson 3.6: Subtracting Across Zeros |
| Chapter 4: Using Bar Models: Addition and Subtraction |
| Lesson 4.1: Using Part-Whole in Addition and Subtraction |
| Lesson 4.2: Adding On and Taking Away Sets |
| Lesson 4.3: Comparing Two Sets |
| Lesson 4.4: Real-World Problems: Two-Step Problems |
| Chapter 5: Length |
| Lesson 5.1: Measuring in Meters |
| Lesson 5.2: Measuring in Centimeters |
| Lesson 5.3: Comparing and Ordering Metric Lengths |
| Lesson 5.4: Real-World Problems: Addition and Subtraction of Metric Lengths |
| Lesson 5.5: Measuring in Feet |
| Lesson 5.6: Measuring in Inches |
| Lesson 5.7: Comparing and Ordering Customary Lengths |
| Lesson 5.8: Real-World Problems: Addition and Subtraction of Customary Lengths |
| Chapter 6: Mass |
| Lesson 6.1: Measuring Kilograms |
| Lesson 6.2: Measuring in Grams |
| Lesson 6.3: Comparing Masses in Kilograms and Grams |
| Lesson 6.4: Real-World Problems: Addition and Subtraction of Masses |
| Chapter 7: Graphs and Line Plots |
| Lesson 7.1: Picture Graphs |
| Lesson 7.2: Bar Graphs |
| Lesson 7.3: Line Plots |
| Chapter 8: Multiplication and Division |
| Lesson 8.2: How to Divide |
| Lesson 8.3: Real-World Problems: Multiplication and Division |
| Lesson 8.4: Odd and Even Numbers |
| Chapter 9: Multiplication Tables |
| Lesson 9.1: Multiply by 2 |
| Lesson 9.2: Multiply by 5 |
| Lesson 9.3: Multiply by 10 |
| Lesson 9.4: Multiply by 3 |
| Lesson 9.5: Multiply by 4 |
| Lesson 9.6: Multiplying Numbers in Any Order |
| Lesson 9.7: Dividing Using Multiplication Facts |
| Chapter 10: Time and Money |
| Lesson 10.1: Reading and Writing Time |
| Lesson 10.2: Using A.M. and P.M. |
| Lesson 10.3: Bills |
| Lesson 10.4: Comparing Amounts of Money |
| Lesson 10.5: Real-World Problems: Money |
| Chapter 11: Shapes |
| Lesson 11.1: Lines and Surfaces |
| Lesson 11.2: Flat Shapes |
| Lesson 11.3: Solid Shapes |