If you are unfamiliar with Which One Doesn’t Belong?, you need to become familiar with it. It is an incredibly powerful framework to kids noticing, talking, and making mathematical meaning.

• Start with WODB.ca (a website curated by Mary Bourassa).
• An amazing explanation of WODB appears in Christopher Danieleson‘s book. The teacher guide is great to pass on to colleagues or hoard to yourself. Buy the book here.

A couple educators on twitter began forming these WODB quartets with Fraction Talk images. This post contains three of their creations. It is my hope that you can see the potential for combining images that already appear on this site into further occasions for student thinking.

Pulling any four will create an instant conversation. WODB provides a way to keep the Fraction Talk love going. The combination stands as yet another example of the power of teachers creating, sharing, and visioning the possible.