## Lesson: Modeling and Recording Addition

Developing the Concept

Once children have had practice adding 1 to numbers 0 through 9, you can introduce the concept of adding 2 to a number. Then you can focus on different ways to make a number, up to 10, include adding doubles.

**Materials:** overhead projector, 10 counters; Learning Tool 2 *(Two-Part Mat),* 10 counters, and Ways to Make (PDF file) worksheets for each child; Race to the Sum (PDF file) game board, spinner (0-4), number cubes (1-6) for every 2 children

**Preparation:** Be prepared to give each child 10 counters and a copy of Learning Tool 2 during the lesson. Prepare Ways to Make (PDF file) worksheets for each child. Make copies of Race to the Sum (PDF file) game boards and spinners with numbers 0-4 for each pair of children

**Prerequisite Skills and Concepts:** Children should be proficient in counting and recognizing numbers to 10. Children should show a good understanding of adding 1 to numbers 0 through 9.

**Wrap-Up and Assessment Hints:**

You can assign to each child or pair of children a number or set of numbers and have them model and write all the ways to make that number.
You can assess children's understanding of addition by observing them as they play Race to the Sum. This game will assess their ability to add numbers to 10 and identify double facts. You may wish to have children record their addition sentences as they play.