Title: Exploring Addition of 2-Digit Numbers within 20

Grade Level: 1st or 2nd grade

Learning Intention: Students will be able to add 2-digit numbers within 20 using the concept of bonds.

Lesson Outline:

1. Introduction (5 minutes) a. Begin the lesson by asking students if they know what addition means. b. Explain that addition is the process of combining two or more numbers to find the total. c. Share the learning intention: Today, we will learn how to add 2-digit numbers within 20 using a special strategy called bonds.

2. Warm-up Activity (10 minutes) a. Display a number bond template on the board or use a large piece of chart paper. b. Choose a 2-digit number within 20 (e.g., 14) and write it in the center of the number bond. c. Ask students to brainstorm different ways to break down the number into two parts that add up to the given number. d. Model their suggestions on the number bond, emphasizing that the two parts should add up to the whole number. e. Repeat the activity with a few more examples, encouraging students to think creatively.

3. Guided Practice (15 minutes) a. Provide each student with a worksheet containing several addition problems involving 2-digit numbers within 20. b. Model the process of using bonds to solve the first problem on the board. c. Guide students through solving the next few problems together, emphasizing the use of bonds to break down the numbers. d. Circulate around the classroom, providing support and feedback to individual students as they work on their worksheets.

4. Independent Practice (15 minutes) a. Distribute additional worksheets or interactive online activities for students to practice adding 2-digit numbers within 20 using bonds. b. Encourage students to use the bond strategy to solve the problems independently. c. Monitor their progress and provide assistance as needed.

5. Consolidation (10 minutes) a. Gather the students back together as a whole group. b. Ask a few students to share their strategies for solving the problems using bonds. c. Summarize the key points of the lesson, emphasizing the importance of breaking down the numbers into smaller parts to make addition easier. d. Provide positive feedback and praise for their efforts.

6. Extension Activity (optional) a. For students who finish early or need an extra challenge, provide a set of word problems involving 2-digit numbers within 20. b. Encourage them to use the bond strategy to solve the problems and explain their thinking.

7. Conclusion (5 minutes) a. Review the learning intention: Today, we learned how to add 2-digit numbers within 20 using bonds. b. Ask students to reflect on what they have learned and how they can apply this strategy in their future math work. c. Thank the students for their participation and effort.

Note: Adjust the duration of each section based on the needs and pace of your students.