This Towers and Structures Unit for Grade 3 covers all those experiments students need to engage in to learn about the different parts of a structure, the forces that act on structures and how to make structures stronger. Includes two lessons based on the story the 3 Little Pigs and a paper stool challenge at the end of the unit. Includes: What is a structure? Man made vs. nature structures The foundation and how to make it stronger Posts, beams and the frame for your structure Why does the Leaning Tower of Pisca lean? What is the strongest 2D shape? Testing the materials the 3 Little Pigs used in their structures The advantages of domes Choosing a shape and materials for a roof, revising the 3 Little Pigs Using a lever, it's parts and how to pick up heavier objects. The paper stool challenge