Edheads offers interactive lessons on simple and compound machines, complete with teacher resources and links to further lessons. Once you click on the site below, click on the "click here to start" button in the center of the screen. There are several animated scenes that explain in detail all of the simple machines and the details of compound machines. There are also activities at the end of each of them for student use.

http://www.edheads.org/activities/simple-machines/index.shtml

machines.JPG

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