**Engage:**

1. Have students sit where they can view the slide presentation. Before you begin, discuss the book 100 Hungry Ants and what happened to the ants. Tell the students they will watch a presentation about ants at a picnic just like in the book. The difference is 100 more ants join them. Ask students what they think will happen.

2. Show the presentation. When the second slide opens, ask a student to read it to the group. Give the children think time to formulate an answer. Have students turn to their neighbor and share their answers. Show the next slide and discuss various strategies for solving this problem. Continue this for the next two slides.

**Explore:**

1. Tell students that they are going to play a game using the 100 ants. Display and read the directions to the class.

2. Use a presentation camera and projector to model the game with a student. Ask students to make predictions as they play.

3. Have students play the game with a partner.

**Explain: **

After about 10 minutes have the student stop play for a short discussion. Ask probing questions such as: What did you notice? Why did that happen? Will it happen everytime?

**Extend:**

As you observe student play, notice which students have mastered the activity with two cards. Challenge them to use three cards and add or subtract 100 (this will require extra sticker pages and the extention recording sheet).

**Evaluate:**

Evaluation and adaptations for individual students should be ongoing. Recording sheets (attached) can be collected and used for grades if desired.