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Cómo funcionan las máquinas simples (How Simple Machines Work)
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Forces and motion are key concepts in the elementary science curriculum. This Spanish-language series uses simple text, full-color photographs and a wealth of clear, instructive diagrams to help ELL students understand the principles behind simple machines. The text uses authentic language and is designed to build reading skills as well as knowledge of basic science concepts.
Cómo funcionan las máquinas simples (How Simple Machines Work) Complete Set (1 copy of each title)
WR7447


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howleverswork.gif Cómo funcionan las palancas (How Levers Work)
WR7448


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howpulleyswork.gif Cómo funcionan las poleas (How Pulleys Work)
WR7449


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howrampswedgesandscrewswork.gif Cómo funcionan las rampas, las cuñas, y los tornillos (How Ramps, Wedges, and Screws Work)
WR7450


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howwheelsandaxleswork.gif Cómo funcionan las ruedas y los ejes (How Wheels and Axles Work)
WR7451


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