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Handy Measuring Ratio
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In this activity, learners use their hands as tools for indirect measurement.

The Shadow Knows I
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In this activity, learners will measure the length of their shadow from the Sun and compare it three to four months later.
Find Someone: Use Math to Learn About Friends
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Create a “Find Someone” list, with about 10 items, each containing a shape, number, or measurement. Can you find someone in the group with hair about 4 inches long? Someone wearing parallel lines?

Globe at Night
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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

Incredible Shrinking Shapes
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In this activity, learners get hands-on experience with ratios and scaling while making their own jewelry out of recycled plastic containers.

Are We Almost There?
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In this mathematics activity, learners use a map to determine the coordinates of and distance between two locations--both by road and "as the crow flies".

Static Friction Prediction
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In this activity (page 2 of PDF under GPS: Kinetic Sculpture Challenge Activity), learners will predict which objects have to overcome the most static friction to slide down a ramp.
Soaring Towers: Building with Recycled Materials
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In this activity, learners will build the highest tower they can out of recycled materials.

Greeting Card Boxes
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In this activity, learners make cool boxes out of old (or new) greeting cards or postcards.

Hand Biometrics Technology
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In this activity, learners explore how engineers incorporate biometric technologies into products as well as the challenges of engineers who must weigh privacy, security and other issues when designin