Section A: Develop Fluency with Addition and Subtraction within 10

Practice Problems

• Lesson 1 : Sums I Know

• Lesson 2 : Relate Counting to Addition

• Lesson 3 : Are the Expressions Equal?

• Lesson 4 : Sums of 10

• Lesson 5 : Find the Difference

• Lesson 6 : Story Problems Within 10

• Lesson 7 : Center Day 1

Section B: Add and Subtract Using Ten as a Unit

Practice Problems

• Lesson 8 : Ten as a Unit

• Lesson 9 : Addition With a Ten

• Lesson 10 : Addition and Subtraction With a Ten

• Lesson 11 : Add to a Teen Number

• Lesson 12 : Subtract From a Teen Number

• Lesson 13 : More Story Problems With Teen Numbers

• Lesson 14 : Center Day 2

Section C: Add Within 20

Practice Problems

• Lesson 15 : Solve Story Problems With Three Numbers

• Lesson 16 : Add Three Numbers

• Lesson 17 : Make 10 to Add

• Lesson 18 : Patterns in Addition

• Lesson 19 : Methods for Addition Within 20

• Lesson 20 : A Trip to the Zoo

• Lesson 21 : Center Day 3

Section D: Subtract Within 20

Practice Problems

• Lesson 22 : Subtract From Teen Numbers

• Lesson 23 : Use a Ten to Subtract

• Lesson 24 : Relate Counting to Addition and Subtraction

• Lesson 25 : How Do You Want to Subtract?

• Lesson 26 : What’s the Story?

• Lesson 27 : Center Day 4

• Lesson 28 : Around the Room