About how many do you see?

How do you know?

What do you notice that can help you estimate?

What makes estimating hard?

1, 2, 3, 4, 5, 6+

Seeing mathematics in the world

Attending to and using structure

Decomposing and using benchmarks to estimate

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

This picture shows just part of plaza. How big do you think the plaza might be based on what you can see here? About how many people do you think there are in the entire plaza?