About how many balloons do you see? How do you know?

What do you notice that can help you estimate?

What makes estimating hard?

1, 2, 3, 4

Seeing mathematics in the world

Attending to and using structure

Composing and decomposing number

Decomposing and using benchmarks to estimate

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

What do you wonder now?