 1 Topic 1 Addition Strategies Lesson 1-1:  Doubles and Near Doubles Also consider: Lesson 1-1:  Doubles and Near Doubles Also consider: Lesson 1-2:  Adding in Any Order Also consider: Lesson 1-2:  Adding in Any Order Also consider: Lesson 1-3:  Adding Three Numbers Lesson 1-3:  Adding Three Numbers Lesson 1-4:  Making 10 to Add Also consider: Lesson 1-4:  Making 10 to Add Also consider: Lesson 1-5:  Writing to Explain Also consider: Lesson 1-5:  Writing to Explain Also consider:
 2 Topic 2 Subtraction Strategies Lesson 2-1:  Making 10 to Subtract Lesson 2-1:  Making 10 to Subtract Lesson 2-2:  Connecting Addition and Subtraction Also consider: Lesson 2-2:  Connecting Addition and Subtraction Also consider: Lesson 2-3:  Thinking Addition to 10 to Subtract Also consider: Lesson 2-3:  Thinking Addition to 10 to Subtract Also consider: Lesson 2-4:  Thinking Addition to 20 to Subtract Also consider: Lesson 2-4:  Thinking Addition to 20 to Subtract Also consider: Lesson 2-5:  Addition and Subtraction Facts Lesson 2-5:  Addition and Subtraction Facts Lesson 2-6:  Use Tools Also consider: Lesson 2-6:  Use Tools Also consider:
 3 Topic 3 Numbers to 1,200 Lesson 3-1:  Counting Hundreds, Tens, and Ones Lesson 3-1:  Counting Hundreds, Tens, and Ones Lesson 3-2:  Reading and Writing Numbers to 999 Lesson 3-2:  Reading and Writing Numbers to 999 Lesson 3-3:  Counting Thousands, Hundreds, Tens, and Ones Lesson 3-3:  Counting Thousands, Hundreds, Tens, and Ones Lesson 3-4:  Reading and Writing Numbers to 1,200 Lesson 3-4:  Reading and Writing Numbers to 1,200 Lesson 3-5:  Ways to Make Numbers Lesson 3-5:  Ways to Make Numbers Lesson 3-6:  Use Reasoning Lesson 3-6:  Use Reasoning
 4 Topic 4 Comparing and Ordering to 1,200 Lesson 4-1:  Numbers to 1,200 on the Number Line Lesson 4-1:  Numbers to 1,200 on the Number Line Lesson 4-2:  Locating Numbers on an Open Number Line Lesson 4-2:  Locating Numbers on an Open Number Line Lesson 4-3:  Comparing Numbers Lesson 4-3:  Comparing Numbers Lesson 4-4:  Ordering Numbers Lesson 4-4:  Ordering Numbers Lesson 4-5:  Greater Than and Less Than Lesson 4-5:  Greater Than and Less Than Lesson 4-6:  Look for a Pattern Lesson 4-6:  Look for a Pattern
 5 Topic 5 Exploring Addition and Subtraction Lesson 5-1:  Adding Tens Lesson 5-1:  Adding Tens Lesson 5-2:  Adding Ones Lesson 5-2:  Adding Ones Lesson 5-3:  Adding Tens and Ones Lesson 5-3:  Adding Tens and Ones Lesson 5-4:  Adding on a Hundred Chart Lesson 5-4:  Adding on a Hundred Chart Lesson 5-5:  Subtracting Tens Lesson 5-5:  Subtracting Tens Lesson 5-6:  Finding Parts of 100 Lesson 5-6:  Finding Parts of 100 Lesson 5-7:  Subtracting on a Hundred Chart Lesson 5-7:  Subtracting on a Hundred Chart Lesson 5-8:  Two-Step Problems Lesson 5-8:  Two-Step Problems