About how many do you see?

How do you know?

What do you notice that can help you estimate?

What makes estimating hard?

3, 4, 5, 6+

Seeing mathematics in the world

Attending to and using structure

Decomposing and using benchmarks to estimate

Thinking in equal groups

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

How long do you think it would take all these people to cross the street? What would you need to know to figure it out? Why?