What it is: A math exploration and critical thinking exercise collection.

Levels: A, B, C, D, E

How to Use it: Students explore images and come up with conjectures and proofs about which one doesn’t belong. Strengthens critical thinking, conjectures, proofs, and the idea that there can be multiple ways to look at something. After kids are familiar with Which One Doesn’t Belong exercises, ask them to come up with their own.