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    WGBH
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    Professor John Endler traveled to Trinidad in the 1970s to study wild guppies. In this activity, learners take part in an online simulation of Endler's work. Learners collect data, formulate a...

    1 cent - $1 per group Ages 11 - adult 45 to 60 minutes
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    PBS
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    In this math lesson, learners apply the concepts of ratio and proportion to the capture-recapture statistical procedure. Learners are given containers (the bay) and an unknown number of fish-shaped...

    $5 - $10 per group Ages 11 - 14 45 to 60 minutes
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    National Health Museum
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    In this activity, learners experience firsthand how marine animals' adaptive coloration camouflages them from prey. Learners design fish out of red paper and then attempt to locate their fish...

    $1 - $5 per group Ages 14 - 18 45 to 60 minutes
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    Lawrence Hall of Science
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    In this outdoor activity/field trip, learners investigate the special shapes, holding structures and holding behaviors that real organisms use in streams, rivers, creeks or coast intertidal zones...

    $5 - $10 per group Ages 8 - 18
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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
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    California Academy of Sciences
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    In this activity, learners use a model for how fishing affects marine life populations, and will construct explanations for one of the reasons why fish populations are declining. Learners also...

    $5 - $10 per group Ages 8 - 14 30 to 45 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