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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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    Howard Hughes Medical Institute
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    This guided inquiry three-part activity engages learners in thinking about the mechanism of natural selection through data collection and pattern recognition. In this scenario, learners use M&...

    $5 - $10 per group Ages 11 - 18 1 to 2 hours
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    NOAA
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    In this 6-7 day investigation, learners begin with an introduction to seamounts that are present in the Gulf of Alaska. They learn how seamounts were formed and look at a bathymetric map of a...

    $5 - $10 per group Ages 11 - 14 1 to 7 days
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    PBS
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    In this math lesson, learners record and graph plant growth and interpret data. Learners plant seeds, and once the seeds sprout, record the change in height of the plants for several days. They...

    $5 - $10 per group Ages 8 - 11 1 to 4 weeks
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    Twin Cities Public Television
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    In this activity, learners conduct a waste audit and use their findings to implement a plan for reducing trash. Learners measure trash, sort by categories (compostable, recyclable, etc.) and...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours
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    Railroad Commission of Texas
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    In this activity about global climate change, learners will conduct an experiment and collect data to compare the amount of carbon dioxide (CO2) in four different sources of gases. Learners will...

    $5 - $10 per student Ages 11 - 18 45 to 60 minutes
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    BioEd
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    In this food science activity, learners conduct an experiment that demonstrates the importance of light to plants. This 1-2 week activity allows learners to learn about the needs of plants and...

    $5 - $10 per group Ages 8 - 14 1 to 4 weeks
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    In this activity, learners investigate passive solar building design with a focus solely on heating. They learn how insulation, window placement, thermal mass, surface colors, and site orientation...

    $5 - $10 per group Ages 14 - 18 4 to 24 hours
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    Twin Cities Public Television
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    In this activity, learners will test cups full of potting soil, sand, and sphagnum moss to see which earth material is able to soak up the most water. Using a scale and a simple calculation,...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours
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    NSBRI
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    In this activity related to indoor air pollution, learners build take-home dust catchers with wax paper and petroleum jelly. After a set monitoring period, learners conduct representative particle...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours

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