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    WGBH
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    In this water activity, learners discover ways to move water across the water table. Learners use various tools including squirt bottles, sponges, and turkey basters to move water from one...

    $5 - $10 per group Ages 4 - 6 10 to 30 minutes
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    PBS
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    In this math lesson, learners play a game to identify the properties of prime, composite, abundant, deficient and perfect numbers. Learners use a game board comprised of the numbers from 1 to 30...

    1 cent - $1 per group Ages 11 - 14 45 to 60 minutes
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    University of Wisconsin-Madison
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    In this investigation, learners plant seeds in a 2-liter bottle filled with soil that is connected to a water source below. Over the next few weeks, learners observe how the plants grow. The...

    $1 - $5 per student Ages 4 - 14 1 to 4 weeks
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    APSnet
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    In this laboratory exercise, learners will discover how many different plant hosts they can find that are infected by the same genus of a powdery mildew fungus, or how many different genera of...

    $1 - $5 per group Ages 11 - 18 45 to 60 minutes
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    IEEE
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    In this activity, learners explore how engineers have met the challenge of keeping foods, liquids, and other items cool. Learners learn about heat transfer, vacuums, and insulation and design a...

    $10 - $20 per group Ages 8 - 18 1 to 2 hours
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    NRICH
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    This puzzle provides an interesting context which challenges learners to apply their knowledge of the properties of numbers. Learners need to work with various types of numbers at the same time and...

    1 cent - $1 per student Ages 11 - 14 5 to 10 minutes
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    The Exploratorium
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    This activity guide includes instructions on how to build a "Shake Table" by mounting an eccentric mass (off center) on the shaft of a small dc motor. Learners use this table to simulate...

    Over $20 per group Ages 11 - 18 45 to 60 minutes
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    Lawrence Hall of Science
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    Learners make a "menu" of any plants in their lunch for Monday through Friday and draw the plants from their lunch. Plants can include fruits, vegetables, grains in cereal or bread, and...

    free Ages 6 - 11 1 to 7 days
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    Centers for Ocean Sciences Education Excellence
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    In this activity, learners role-play the part of lake inhabitants and the aquatic exotics who displace the native species. Props are used to help demonstrate how aquatic exotic species enter a lake...

    $10 - $20 per group Ages 8 - 14 45 to 60 minutes
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    Canadian Space Agency
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    In this activity, groups of four learners must complete a set of four manual tasks. The restrictions are that they must complete the tasks in a limited time while wearing garden or rubber gloves....

    Over $20 per group Ages 8 - 14 10 to 30 minutes

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