On Monday I read the class a book called The Greedy Triangle to begin our study of geometry.  This triangle isn’t happy with his number of sides and vertices.  So, he visits a Shape-Shifter who grants his wish and gives him one more side and vertex.  Now the triangle is a quadrangle.  The greedy character still isn’t happy so he returns to the Shape-Shifter over and over and changes to a pentagon, hexagon, heptagon, etc.  After listening to the book the students had a chance to build their own shapes with toothpicks and marshmallows to match the changing shape character.  We even got to eat a few marshmallows at the end of class!