From Amazon: Bored and dissatisfied with his life, a triangle visits a local shapeshifter to add another angle to his shape. Poof! He becomes a quadrilateral. But then he gets greedy and keeps adding angles until he's completely transformed.
Students seem to always enjoy this book when I read it, and this year I had a little something special to add. Thanks to a Math Solutions training, I learned how to make a shapeshifter for them to manipulate during the story!
All you need is 4 inch squares of construction paper. Fold in half to make a rectangle, then again to make a small square. Unfold, and fold in half diagonally both ways. Then fold the corners to the middle (the students know how to do this from making fortune tellers).
As you read the story, manipulate the opened square to make: triangle, quadrilateral, pentagon, and hexagon! I like giving the kids a chance to try to come up with the shape on their own.
We had so much fun telling the story with our shapeshifters!