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    PBS
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    In this math lesson, learners model exponential decay and exponential growth using M&M's, paper folding, and African rhino population data. Learners collect data, create scatterplots, and...

    $1 - $5 per group Ages 14 - 18 1 to 2 hours
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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 Park Service
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    In this online interactive, learners explore the various types of life that live in fresh water systems and how the presence of these organisms is an indication of the overall health of the water....

    free Ages 8 - 14 10 to 30 minutes
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    Children's Museum Of Houston
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    In this activity, learners use measurement concepts to make models of what their body parts might look like if they were a snake or a chameleon.

    $1 - $5 per student Ages 8 - 11 10 to 30 minutes
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    Children's Museum Of Houston
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    In this math activity related to volume, learners use problem solving skills to calculate and build a model house for Minus the dog. Learners are given certain parameters that they follow as they...

    1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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    NSBRI
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    In this activity about daily rhythms (on page 17 of the PDF), learners will explore circadian patterns in humans, animals and plants. They will observe that some behaviors and functions of living...

    $1 - $5 per group Ages 8 - 14 1 to 7 days
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    NSBRI
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    In this activity (on page 12 of the PDF), learners make a sundial (shadow clock) appropriate for their geographic location in the northern hemisphere and use it to tell time. This is an...

    $1 - $5 per group Ages 8 - 14 1 to 7 days
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    Twin Cities Public Television
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    This activity (on page 2 of the PDF) is a full inquiry investigation into absorption and reflection of radiant energy. In order to build a house that keeps a dog as cool possible in the heat,...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours
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    Mount Holyoke College
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    This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo. Learners also think about how pheromones could be used to...

    $1 - $5 per group Ages 4 - 8 10 to 30 minutes
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    NCTM Illuminations
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    Using the story "The Celebrated Jumping Frog of Calaveras County" by Mark Twain, learners simulate a jumping-frog contest and determine the distances "jumped." Learners record...

    1 cent - $1 per group Ages 11 - 14 45 to 60 minutes

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