Simple Machines covers these concepts: work is done when a force is used to move something over a distance, some jobs take more work that other jobs, machines make work easier, machines may have few, many, or no moving parts, the lever is a simple machine, the wheel and axle is a simple machine, the pulley is a simple machine, the inclined plane is a simple machine, the screw is a simple machine, and the wedge is a simple machine. A variety of engaging activities present the concepts in ways that students can understand. Each concept presented includes: teacher directions for lessons and reproducible resource pages such as sets of picture cards, minibooks, and lab sheets to record the results of hands-on investigations.