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    American Museum of Natural History
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    This activity helps learners understand how the angle of the Sun affects temperatures around the globe. After experimenting with a heat lamp and thermometers at differing angles, learners apply...

    $1 - $5 per group Ages 11 - 18 45 to 60 minutes
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    PBS
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    In this math lesson, learners use hinged mirrors to discover that regular polygons are composed of triangles tessellating around a center point. Learners then sketch these triangles on paper models...

    1 cent - $1 per group Ages 8 - 11 1 to 2 hours
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    The Exploratorium
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    In this activity, learners use a compact disc to make a spectrometer, an instrument used to measure properties of light. Learners use their spectrometer to view a continuous spectrum produced by...

    $1 - $5 per student Ages 11 - 18 30 to 45 minutes
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    The Exploratorium
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    In this activity, learners create angle-measuring devices--protractors--out of paper. Learners follow a series of steps to fold a square sheet of paper into a triangular Pocket Protractor. Learners...

    1 cent - $1 per student Ages 11 - 18 5 to 10 minutes
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    The Exploratorium
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    In this activity, learners construct three quick and simple mechanisms to start building a pop-up book. Learners fold, cut, and glue paper to make a bird beak, parallelogram, and V-fold. This...

    1 cent - $1 per student Ages 6 - 14 30 to 45 minutes
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    Optical Society of America
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    In this optics activity, learners explore how many objects they can see in a set of mirrors (hinged like a book) at various angles. Use this activity to introduce learners to how mirrors work as...

    1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners use a hand-made protractor to measure angles they find in playground equipment. Learners will observe that angle measurements do not change with distance, because they...

    1 cent - $1 per student Ages 11 - 14 10 to 30 minutes
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    The Exploratorium
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    In this math activity, learners observe and sketch cracking patterns in pavement. Learners use a protractor to measure and label the angles of their sketches and conclude if some angles are more...

    1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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    University of Washington
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    This activity (8th activity on the page) tests learners' ability to identify things using only the sense of hearing. A blindfolded learner listens as another learner approaches him holding a...

    free Ages 8 - 18 5 to 10 minutes
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    Worcester Polytechnic Institute
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    Groups of learners are provided with a generic car base and an egg. Their mission: design a device/enclosure to protect the egg on or in the car as it rolls down a ramp with increasing slopes....

    Over $20 per group Ages 11 - 18 1 to 2 hours

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