This is a PowerPoint lesson I have created. I use it with my Eno board, but it can be used with any interactive whiteboard (including Smart Boards) that can open PowerPoints. I teach it for 15.6 in Houghton Mifflin, but it can be used on its own to teach students how to classify solid figures. At the end of the introduction there is a game that reviews what was taught. I use it with clickers, but it can be used with index cards, by raising their hands, calling out their responses, etc. It provid