About how many trays do you see?

How do you know?

What did you notice in this image that helped you?

3, 4, 5

Seeing mathematics in the world

Attending to and using structure

Decomposing and using benchmarks to estimate

Thinking in equal groups

If your school uses trays for lunch, invite students to explore the question:

About how many trays do we have in our lunch room?

How could you figure it out?

Why does your lunch room have that many trays?