Which one doesn't belong? Playing with shapes

A math concept book that encourages creative thinking and celebrates all answers, as none are wrong!A lengthy introduction of five and a half spreads introduces readers to the kind of mathematical thinking Danielson encourages. The first spread matches the final ones and presents four shapes, asking readers: "Which one doesn't belong? Why?" The next spreads explain how every answer is correctone needs only to support it. Is it the triangle among the quadrilaterals? The one shape that is an outline instead of a solid color? Nine spreads then follow that each present kids with four new shapes and the same questions, bold colors attracting and holding interest as kids pore over the similarities and differences. The author's note emphasizes that "All properties count here; all ideas matter.You're thinking in a mathy way when you notice sameness and difference for one property at a time." And refreshingly, Danielson doesn't care about technical languageobservations trump terms, so don't worry about describing them as "smoosheddentedor colored in"; just describe them. This is one shape book that will both challenge readers' thinking and encourage them to think outside the box. (Math concept book. 4-8) Copyright Kirkus Reviews, used with permission.

This book is different from other books about shapes. Every page asks the same question, and every answer can be correct.  Look at these shapes. There are many ways they are alike and different. Pick out a shape that seems different from the others.  Which one doesn't belong? Why? Excerpted from Which One Doesn't Belong?: Playing with Shapes by Christopher Danielson All rights reserved by the original copyright owners. Excerpts are provided for display purposes only and may not be reproduced, reprinted or distributed without the written permission of the publisher.