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    University of Nebraska State Museum
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    This activity (on pages 38-43) has learners simulate the way scientists track and map the movement of otters in the wild using radio trackers. One learner plays the role of Sea Otter, and other...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    WGBH
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    This guide features three related ramp explorations in which learners investigate the following science concepts: when placed on a ramp, some objects roll, others slide, and others stay put; the...

    $5 - $10 per group Ages 4 - 6 45 to 60 minutes