Title: Exploring Rainbow Facts and Applying Them to Two-Digit Addition

Objective: By the end of this lesson, Year 3 students will be able to: 1. Understand and recall rainbow facts from 1 to 10. 2. Apply rainbow facts to solve two-digit addition problems.

Materials: - Whiteboard or chart paper - Markers - Rainbow Fact flashcards (1 to 10) - Two-digit addition worksheets - Pencils - Colored pencils or crayons

Lesson Plan:

Introduction (5 minutes): 1. Begin the lesson by asking students if they know what rainbow facts are. Allow a few responses. 2. Explain that rainbow facts are pairs of numbers that add up to 10. For example, 3 + 7 = 10. 3. Show the Rainbow Fact flashcards (1 to 10) and go through them together, emphasizing the pairs that add up to 10. 4. Write down the rainbow facts on the whiteboard or chart paper as you go through them.

Main Activity - Rainbow Fact Practice (15 minutes): 1. Distribute the Rainbow Fact flashcards to the students, ensuring each student has a set. 2. Instruct the students to work in pairs or small groups. 3. Ask the students to take turns holding up a flashcard and stating the missing number to complete the rainbow fact. For example, if the card shows 3 + __ = 10, the student should say 7. 4. Encourage the students to help each other if they are struggling to find the missing number. 5. Continue this activity for about 10 minutes, allowing students to practice recalling the rainbow facts.

Extension Activity - Two-Digit Addition (10 minutes): 1. Explain to the students that rainbow facts can also be helpful when solving two-digit addition problems. 2. Write a two-digit addition problem on the board, such as 34 + 7. 3. Ask the students if they can use any rainbow facts to help them solve this problem. Guide them to recognize that 4 + 6 = 10, so they can use this fact to make the problem easier. 4. Model how to break down the problem using the rainbow fact: 34 + 6 + 1 = 40 + 1 = 41. 5. Provide a few more examples on the board, gradually increasing the complexity of the problems. 6. Distribute the two-digit addition worksheets to the students. 7. Instruct them to solve the problems independently, using rainbow facts whenever possible. 8. Circulate the classroom to provide assistance and monitor progress.

Conclusion (2 minutes): 1. Gather the students back together as a whole group. 2. Recap the concept of rainbow facts and how they can be used to solve two-digit addition problems. 3. Ask a few students to share their strategies or solutions from the worksheet. 4. Congratulate the students on their hard work and understanding of rainbow facts and two-digit addition.

Note: Adjust the lesson duration and difficulty level of the problems according to the students’ abilities and progress.