Which One Doesn't Belong?

​Which One Doesn’t Belong by Christopher Danielson belongs in every elementary school classroom. Each student should be able to pick up a copy of this book any time she chooses, look at the four shapes on each page and ask herself why each shape doesn’t belong. It’s a puzzle with multiple answers. But more importantly, it’s a tool that will lead to rich, deep mathematical discussions in the classroom. And most importantly, it will help your learners respect one another as they listen to each other’s ideas. Sound overwhelming? No, worries! There’s an outstanding, detailed, easy-to-follow, seventy-five page teacher’s guide to go with it. Check it out at https://www.stenhouse.com/content/which-one-doesnt-belong .