This unit is designed to engage student's prior experiences with motion, forces, and interactions on the playground. Students will learn what a force is by recording everything they can safely do to someone on a swing to make them move, eventually learning that no matter what they did it falls into the category of a push or a pull. At the end of activity one students should be able define a force as a push or a pull that changes the motion of an object. Students will then use model swings (tire