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    The Exploratorium
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    In this activity, learners investigate the relative growth of lengths, areas, and volumes as cylinders are scaled up. Learners connect their experience with cylinders to the world outside the...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours
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    Lunar and Planetary Institute
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    In this activity, learners work in pairs to measure each other's ankles with lengths of string. Learners make measurements both before and after lying on their backs with their feet in the air...

    $1 - $5 per group Ages 8 - 14 5 to 10 minutes
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    The University of Texas McDonald Observatory
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    In this activity, learners observe colors in the flame of a burning candle to explore connections between matter, light, color and temperature -- basic concepts of matter and energy. Then, learners...

    $1 - $5 per group Ages 14 - 18 45 to 60 minutes
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    WGBH
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    In this activity, learners use a soda can to decode a secret message. Learners wrap scytale (pronounced ski-tally) code around a can and challenge friends to see if they can crack the codes....

    1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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    PBS
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    In this math lesson, learners practice measurement skills as they examine a soap bubble print. Learners follow a recipe to make a soap bubble solution. They use the soapy solution to blow large...

    $1 - $5 per group Ages 8 - 11 45 to 60 minutes
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    Lawrence Hall of Science
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    Using a real-size sketch of a baby elephant's footprint, learners estimate, measure and record the width (diameter) and outside edge length (perimeter or circumference) of the footprint. Then...

    1 cent - $1 per group Ages 4 - 11 30 to 45 minutes
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    COSI
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    In this mathematics activity (page 4 of the PDF), learners will explore the relationship between the diameter and circumference of an object. They will see that no matter what the object, these...

    $1 - $5 per student Ages 11 - 18 10 to 30 minutes
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    University of Southern Mississippi
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    In this activity, learners prepare four polymer elastomers and then compare their physical properties, such as texture, color, size, and bounce height. This activity is a fun way for learners to...

    $5 - $10 per group Ages 4 - 14 1 to 2 hours
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    The Exploratorium
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    In this activity, learners use a straight line to learn about circles. Learners measure and record the diameter and circumference of different sized cylindrical objects on a chart. Learners then...

    $1 - $5 per group Ages 11 - 18 30 to 45 minutes
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    Twin Cities Public Television
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    In this activity (located on page 2 of the PDF), learners will identify a group of deciduous trees to study. Once the species has been recorded, the circumference of the trunks will be measured at...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours

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