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| Lesson 1.1: Model and Count 1 and 2 |
| Lesson 1.2: Understand and Write 1 and 2 |
| Lesson 1.3: Model and Count 3 and 4 |
| Lesson 1.4: Understand and Write 3 and 4 |
| Lesson 1.5: Model and Count 5 |
| Lesson 1.6: Understand and Write 5 |
| Lesson 1.7: The Concept of Zero |
| Lesson 1.8: Count and Order Numbers to 5 |
| Lesson 2.1: Equal Groups |
| Lesson 2.2: Greater Than |
| Lesson 2.3: Less Than |
| Lesson 2.4: Compare Groups to 5 by Counting |
| Lesson 2.5: Compare Numbers to 5 |
| Lesson 3.1: Model and Count 6 |
| Lesson 3.2: Understand and Write 6 |
| Lesson 3.3: Model and Count 7 |
| Lesson 3.4: Understand and Write 7 |
| Lesson 3.5: Model and Count 8 |
| Lesson 3.6: Understand and Write 8 |
| Lesson 3.7: Model and Count 9 |
| Lesson 3.8: Understand and Write 9 |
| Lesson 3.9: Model and Count 10 |
| Lesson 3.10: Understand and Write 10 |
| Lesson 3.11: Count and Order Numbers to 10 |
| Lesson 4.1: Compare Groups to 10 by Matching |
| Lesson 4.2: Compare Groups to 10 by Counting |
| Lesson 4.3: Compare Numbers to 10 |
| Lesson 4.4: Classify Objects into Categories |
| Lesson 4.5: Classify and Compare by Counting |
| Lesson 5.1: Partner Numbers to 5 |
| Lesson 5.2: Use Number Bonds to Represent Numbers to 5 |
| Lesson 5.3: Compose and Decompose 6 |
| Lesson 5.4: Compose and Decompose 7 |
| Lesson 5.5: Compose and Decompose 8 |
| Lesson 5.6: Compose and Decompose 9 |
| Lesson 5.7: Compose and Decompose 10 |
| Lesson 5.8: Compose and Decompose Using a Group of 5 |
| Lesson 6.1: Understand Addition |
| Lesson 6.2: Addition: Add To |
| Lesson 6.3: Addition: Put Together |
| Lesson 6.4: Addition: Partner Numbers |
| Lesson 6.5: Addition Number Patterns |
| Lesson 6.6: Practice Addition |
| Lesson 6.7: Use a Group of 5 to Add |
| Lesson 6.8: Add to Make 10 |
| Lesson 7.1: Understand Subtraction |
| Lesson 7.2: Subtraction: Take From |
| Lesson 7.3: Subtraction: Take Apart |
| Lesson 7.4: Subtraction Number Patterns |
| Lesson 7.5: Practice Subtraction |
| Lesson 7.6: Use a Group of 5 to Subtract |
| Lesson 7.7: Related Facts |
| Lesson 8.1: Identify Groups of 10 |
| Lesson 8.2: Count and Write 11 and 12 |
| Lesson 8.3: Understand 11 and 12 |
| Lesson 8.4: Count and Write 13 and 14 |
| Lesson 8.5: Understand 13 and 14 |
| Lesson 8.6: Count and Write 15 |
| Lesson 8.7: Understand 15 |
| Lesson 8.8: Count and Write 16 and 17 |
| Lesson 8.9: Understand 16 and 17 |
| Lesson 8.10: Count and Write 18 and 19 |
| Lesson 8.11: Understand 18 and 19 |
| Lesson 9.1: Model and Count 20 |
| Lesson 9.2: Count and Write 20 |
| Lesson 9.3: Count to Find How Many |
| Lesson 9.4: Count Forward from Any Number to 20 |
| Lesson 9.5: Order Numbers to 20 |
| Lesson 9.6: Compare Numbers |
| Lesson 10.1: Count to 30 by Ones |
| Lesson 10.2: Count to 50 by Ones |
| Lesson 10.3: Count to 100 by Ones |
| Lesson 10.4: Count to 100 by Tens |
| Lesson 10.5: Count by Tens and Ones |
| Lesson 10.6: Count by Tens from a Number |
| Lesson 11.1: Describe Two-Dimensional Shapes |
| Lesson 11.2: Triangles |
| Lesson 11.3: Rectangles |
| Lesson 11.4: Squares |
| Lesson 11.5: Hexagons and Circles |
| Lesson 11.6: Join Two-Dimensional Shapes |
| Lesson 11.7: Build Two-Dimensional Shapes |
| Lesson 12.1: Two- and Three-Dimensional Shapes |
| Lesson 12.2: Describe Three Dimensional Shapes |
| Lesson 12.3: Cubes and Spheres |
| Lesson 12.4: Cones and Cylinders |
| Lesson 12.5: Build Three-Dimensional Shapes |
| Lesson 12.6: Positions of Solid Shapes |
| Lesson 13.1: Compare Heights |
| Lesson 13.2: Compare Lengths |
| Lesson 13.3: Use Numbers to Compare Lengths |
| Lesson 13.4: Compare Weights |
| Lesson 13.5: Use Numbers to Compare Weights |
| Lesson 13.6: Compare Capacities |
| Lesson 13.7: Describe Objects by Attributes |