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    The Tech Interactive
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    In this design challenge, learners design a storm drain cover that catches litter to protect waterways to learn about how local actions can have system-level effects. Learners will test their...

    $5 - $10 per student Ages 6 - 14 45 to 60 minutes
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    PBS
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    In this environmental science lesson, learners will examine the dangers of mercury and how humans contribute to growing mercury emissions on Earth. First, learners watch a NewsHour video segment...

    $5 - $10 per group Ages 14 - 18 1 to 2 hours
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    Twin Cities Public Television
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    In this quick activity (page 1 of the PDF under SciGirls Activity: California Fish), learners will build a simple Cartesian Diver in an empty 2-liter bottle. Use this activity to demonstrate the...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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    Twin Cities Public Television
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    In this online Flash game, learners will explore a coral reef using an underwater remotely operated vehicle (ROV). Faced with concerns that environments around the world might be undergoing rapid...

    free Ages 6 - 14 5 to 10 minutes