Lesson objective: Add within 5 by putting groups together.

This lesson helps to build procedural knowledge with addition. Number cubes are used here because they help support students in having two separate groups that can be physically put together. This work develops students' understanding that when we add, we can put groups together to find how many there are altogether.

Students engage in Mathematical Practice 1 (Make sense of problems and persevere in solving them) as they play a game involving number cubes, to practice the concept of addition by putting groups together.

**Key vocabulary:**

- add/ addition
- altogether
- groups
- put together

**Special materials needed:**

- additional practice sheets
- number cubes
- in-class practice sheets
- pencils
- red and blue crayons