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simple machines 3rd grade screw wedge inclined plane wheel axle pulley lever.
Ms. Diffy's class research page for simple machines.
Find the links to different resources that will teach you about the simple machines that exist.
Websites with information on simple machines and three classes of levers.
Elementary science links for students and teachers to simple machines
simple machines, levers, pulleys, wheel& axle, inclined plane, screw, wedge