# Lesson 17 Center Day 3

Let’s count large groups of objects and play games to practice adding and creating graphs.

## Warm-up Number Talk: Add Ten More

Find the value of each sum mentally.

## Activity 1 Revisit Counting Collections

We are going to revisit a center you may have played in Kindergarten or first grade. You and your partner will get a collection of objects. Your job is to figure out how many objects are in your collection and show how you counted.

## Activity 2 Centers: Choice Time

Choose a center.

What’s Behind My Back?

How Close?

Number Puzzles

Sort and Display