What’s missing?

How do you know?

K, 1

Seeing mathematics in the world

Attending to and using structure

Connecting number and quantity

Comparing quantities

Equal means the same

Composing and decomposing number

Relating part and whole

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

Design a basketball rack with some balls missing so that someone else could figure out how many are missing. How did you do it?