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    Lunar and Planetary Institute
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    In this activity, learners consider how a simple machine, a lever, turns a small push or pull (a small force) into a larger--or stronger--push or pull (a larger force). Learners then apply this...

    Over $20 per group Ages 4 - 11 10 to 30 minutes
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    PBS
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    The major goal of this math lesson is to have learners collect data from a variety of experiments, determine what models best fits their data, and explain why their models are best. Learners will...

    Over $20 per group Ages 14 - 18 1 to 2 hours
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    WGBH
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    In this activity, learners build a simple tabletop seesaw to test how different variables (the position of the fulcrum, distance, weight) affect its balance under increasing weight loads. Extension...

    1 cent - $1 per student Ages 6 - 11 10 to 30 minutes