Lesson objective: Add numbers using number bonds and counters.

This lesson helps to build procedural skills in whole number addition. Number bonds and counters are used here because they highlight the put together strategy for addition. This work develops students' understanding that addition can be thought of as putting numbers together.

Students engage in Mathematical Practice 1 (Make sense of problems and persevere in solving them) as they use number bonds and counters to solve story problems, thinking of addition as putting numbers together and counting on.

**Key vocabulary:**

- number bond
- number partners

**Special materials needed:**

- counters
- representation of number bonds
- three-part paper plates