How many?

How do you know?

How do you see it?

1, 2, 3

Attending to and using structure

Composing and decomposing number

Thinking in equal groups

Sorting, organizing, and using attributes

After the class has discussed the questions above, you can extend this activity by posing the following questions:

If you added one more domino to the left or the right, how many dots would there be? How do you know?