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| Lesson 1-1: Add To |
| Lesson 1-2: Put Together |
| Lesson 1-3: Both Addends Unknown |
| Lesson 1-4: Take From |
| Lesson 1-5: Compare Situations |
| Lesson 1-6: More Compare Situations |
| Lesson 1-7: Change Unknown |
| Lesson 1-8: Practice Adding and Subtracting |
| Lesson 1-9: Problem Solving: Construct Arguments |
| Lesson 2-1: Count On to Add |
| Lesson 2-2: Doubles |
| Lesson 2-3: Near Doubles |
| Lesson 2-4: Facts with 5 on a Ten-Frame |
| Lesson 2-5: Add in Any Order |
| Lesson 2-6: Count Back to Subtract |
| Lesson 2-7: Think Addition to Subtract |
| Lesson 2-8: Solve Word Problems with Facts to 10 |
| Lesson 2-9: Problem Solving: Look For and Use Structure |
| Lesson 3-1: Count On to Add |
| Lesson 3-2: Count On to Add Using an Open Number Line |
| Lesson 3-3: Doubles |
| Lesson 3-4: Doubles Plus |
| Lesson 3-5: Make 10 to Add |
| Lesson 3-6: Continue to Make 10 to Add |
| Lesson 3-7: Explain Addition Strategies |
| Lesson 3-8: Solve Addition Word Problems with Facts to 20 |
| Lesson 3-9: Problem Solving: Critique Reasoning |
| Lesson 4-1: Count to Subtract |
| Lesson 4-2: Make 10 to Subtract |
| Lesson 4-3: Continue to Make 10 to Subtract |
| Lesson 4-4: Fact Families |
| Lesson 4-5: Use Addition to Subtract |
| Lesson 4-6: Continue to Use Addition to Subtract |
| Lesson 4-7: Explain Subtraction Strategies |
| Lesson 4-8: Solve Word Problems with Facts to 20 |
| Lesson 4-9: Problem Solving: Reasoning |
| Lesson 5-1: Find the Unknown Numbers |
| Lesson 5-2: True or False Equations |
| Lesson 5-3: Make True Equations |
| Lesson 5-4: Add Three Numbers |
| Lesson 5-5: Word Problems with Three Addends |
| Lesson 5-6: Solve Addition and Subtraction Word Problems |
| Lesson 5-7: Problem Solving: Precision |
| Lesson 6-1: Organize Data Into Three Categories |
| Lesson 6-2: Collect and Represent Data |
| Lesson 6-3: Interpret Data |
| Lesson 6-4: Continue to Interpret Data |
| Lesson 6-5: Problem Solving: Make Sense and Persevere |
| Lesson 7-1: Count by 10s to 120 |
| Lesson 7-2: Count by 1s to 120 |
| Lesson 7-3: Count on a Number Chart to 120 |
| Lesson 7-4: Count by 1s or 10s to 120 |
| Lesson 7-5: Count on an Open Number Line |
| Lesson 7-6: Count and Write Numerals |
| Lesson 7-7: Problem Solving: Repeated Reasoning |
| Lesson 8-1: Make Numbers 11 to 19 |
| Lesson 8-2: Numbers Made with Tens |
| Lesson 8-3: Count with Groups of Tens and Ones |
| Lesson 8-4: Tens and Ones |
| Lesson 8-5: Continue with Tens and Ones |
| Lesson 8-6: Different Names for the Same Number |
| Lesson 8-7: Problem Solving: Look For and Use Structure |
| Lesson 9-1: 1 More, 1 Less; 10 More, 10 Less |
| Lesson 9-2: Find Numbers on a Hundred Chart |
| Lesson 9-3: Compare Numbers |
| Lesson 9-4: Compare Numbers with Symbols (>, <, =) |
| Lesson 9-5: Compare Numbers on a Number Line |
| Lesson 9-6: Problem Solving: Make Sense and Persevere |
| Lesson 10-1: Add Tens Using Models |
| Lesson 10-2: Mental Math: Ten More Than a Number |
| Lesson 10-3: Add Tens and Ones Using a Hundred Chart |
| Lesson 10-4: Add Tens and Ones Using an Open Number Line |
| Lesson 10-5: Add Tens and Ones Using Models |
| Lesson 10-6: Make a Ten to Add |
| Lesson 10-7: Add Using Place Value |
| Lesson 10-8: Practice Adding Using Strategies |
| Lesson 10-9: Problem Solving: Model with Math |
| Lesson 11-1: Subtract Tens Using Models |
| Lesson 11-2: Subtract Tens Using a Hundred Chart |
| Lesson 11-3: Subtract Tens Using an Open Number Line |
| Lesson 11-4: Use Addition to Subtract Tens |
| Lesson 11-5: Mental Math: Ten Less Than a Number |
| Lesson 11-6: Use Strategies to Practice Subtraction |
| Lesson 11-7: Problem Solving: Model with Math |
| Lesson 12-1: Compare and Order by Length |
| Lesson 12-2: Indirect Measurement |
| Lesson 12-3: Use Units to Measure Length |
| Lesson 12-4: Problem Solving: Use Appropriate Tools |
| Lesson 13-1: Tell the Value of Coins |
| Lesson 13-2: Find the Value of a Group of Coins |
| Lesson 13-3: Understand the Hour and Minute Hands |
| Lesson 13-4: Tell and Write Time to the Hour |
| Lesson 13-5: Tell and Write Time to the Half Hour |
| Lesson 13-6: Problem Solving: Reasoning |
| Lesson 14-1: Use Attributes to Define Two-Dimensional (2-D) Shapes |
| Lesson 14-2: Defining and Non-Defining Attributes of 2-D Shapes |
| Lesson 14-3: Build and Draw 2-D Shapes by Attributes |
| Lesson 14-4: Compose 2-D Shapes |
| Lesson 14-5: Compose New 2-D Shapes from 2-D Shapes |
| Lesson 14-6: Use Attributes to Define Three-Dimensional (3-D) Shapes |
| Lesson 14-7: Defining and Non-Defining Attributes of 3-D Shapes |
| Lesson 14-8: Compose with 3-D Shapes |
| Lesson 14-9: Problem Solving: Make Sense and Persevere |
| Lesson 15-1: Make Equal Shares |
| Lesson 15-2: Make Halves and Fourths of Rectangles and Circles |
| Lesson 15-3: Understand Halves and Fourths |
| Lesson 15-4: Problem Solving: Model with Math |
| Lesson 16-1: Even and Odd Numbers |
| Lesson 16-10: Read and Write 3-Digit Numbers |
| Lesson 16-2: Use Arrays to Find Totals |
| Lesson 16-3: Add on a Hundred Chart |
| Lesson 16-4: Break Apart Numbers to Add |
| Lesson 16-5: Subtract Tens and Ones on a Hundred Chart |
| Lesson 16-6: Break Apart Numbers to Subtract |
| Lesson 16-7: Solve Problems with Coins |
| Lesson 16-8: Understand Hundreds |
| Lesson 16-9: Models and 3-Digit Numbers |