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    WGBH
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    In this design challenge activity, learners build a tower that can support a tennis ball at least 18 inches off the ground while withstanding the wind from a fan. Learners will build a sturdy frame...

    1 cent - $1 per student Ages 8 - 14 30 to 45 minutes
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    University of Nebraska State Museum
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    This activity (on pages 35-43) lets learners analyze a "herd of elk" to detect the spread of a bacterial disease called brucellosis. The activity simulates how wildilfe veterinarians...

    1 cent - $1 per group Ages 8 - 14 45 to 60 minutes

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