Pulleys 621.8 PUL 1 DVD, 13 minutes. The inhabitants of Mammoth Island need to lift their mammoths so Olive decides to use a simple machine called a pulley to get the job done. Discussion questions and activities -- Downloadable teacher's guide. Series: The Way Things Work. Levers 621.8 LEV 1 DVD, 13 minutes. The inhabitants of Mammoth Island need to weigh their mammoth and discover the three classes of levers in the process. Discussion questions and activities -- Downloadable teacher's guide. Series: The Way Things Work. Bill Nye the Science Guy: Simple Machines 621.8 BIL 1 DVD, 26 minutes. Demonstrates the principles behind a variety of simple machines such as ramps, levers, pulleys and wheels, and shows how simple machines doing complicated things can be found everywhere. Bill Nye Physical Science: Friction/Simple Machines (Revised) 531 BIL 1 VHS videocassette 52 minutes, 2 teachers guides. Friction - 26 min - discusses force, energy, and atomic particles. Simple Machines - 26 min - discusses wheel and axle, pulley, inclined plane, screw, wedge, and lever. Bill Nye Friction 531 BIL DVD- 26 minutes, includes Spanish track Discusses force, energy, and atomic particles. Energy 531 ENE 1 VHS videocassette 20 minutes + 1 teachers guide In this video students learn about the five main forces of energy . Mechanical Energy 531 MEC 1 VHS videocassette 23 minutes + 1 teachers guide Learn what energy is, how it behaves, and why it is important in our daily lives. Mr. Wizard's World: Simple Machines 531 MRW 1 VHS videocassette 25 minutes, 2 dittos, 1 teachers guide. Activity segments: Household Levers; Mobile Challenge; Spoon Flip; How Many Wheels on a Bicycle?; Pulleys Help You Lift; Gears on a Bicycle. Activities progress from simple to complex scientific principles. Simple Machines 531 SIM 1 VHS videocassette 20 minutes, 1 teachers guide Introduces students to simple machines: the lever, inclined plane, wedge, screw, pulley, wheel and axle. Animation and live action illustrate the principles and their usefulness. Includes scenes from Corvallis, Philomath, and other parts of Oregon. Simple machines 621.8 SIM 1 VHS videocassette, 25 minutes + 1 teacher's guide Describes how the principles behind a variety of simple machines such as ramps, levers, pulleys, and the wheel and axle assist humans in making their work easier. Three-Two-One Contact: Friction - Getting a Grip 531 THR 1 VHS videocassette (15 minutes), 1 ditto, 1 teachers guide Examines the process and purpose of friction in movement.