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Wheels Make the World Go...
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Making Machines with Springs
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The Fort on Fourth Street: A...
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The Great Mathemachicken:...
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Pulleys Pull Their Weight:...
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How Do You Lift a Lion?
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Simple Machines: Forces in...
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Screws Keep Things Secure:...
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Keep It Simple, Rapunzel!:...
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Simple Machines
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You Wouldn't Want to Live...
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Simple Machines, Grades 6 -...
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Good Work: Simple Tools
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Simple Machines at the...
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Ancient Machines: From Wedges...
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Moving Heavy Things Rnf
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