Lesson 2 Keep Track of Objects

- Let’s figure out how many objects are in our collections.

Warm-up Number Talk: Add and Subtract 0 and 1

Find the value of each expression.

$3 + 0$
$3 + 1$
$3 - 1$
$2 - 0$

Activity 1 Counting Collections

How many objects are in your collection?

Activity 2 Different Ways to Keep Track

Choose either the 10-frame or the counting mat to help you figure out how many objects are in your collection.

Activity 3 Centers: Choice Time

Choose a center.

Number Race

Center. Number Race.

Subtraction Towers

Center activity. Subtraction Towers.

5-frames

Center. 5 frame.