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School Library Journal
Reviewed on November 1, 2019 | Series Made Simple
K-Gr 3—These titles describe simple machines to new readers who are eager to learn how they make life easier. Some of the machines are more basic than others, like wedges, levers, and inclined planes. Others, like pulleys, screws, and wheels and axles, require a little more engineering. Pulle...Log In or Sign Up to Read More