StoryBook & Literal Spaghetti and Meatballs for All [Perimeter of Rectangle] – Activities for 5th and 6th graders – Lesson plan [PDF] – Math ideas [PPT File] The Greedy Triangle [Shapes & Basic Math Concepts] – Lesson for 1st and 2nd Grade The Clock for the Dreamer [The Concept of Geometry] – Exemplars The 500 Hats of Bartholomew Cubbins [Addition] – Lesson Plan – How Many Hats?