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In this activity, learners use their feet to estimate distances. Learners calculate the distance of one step in centimeters by measuring 10 steps at a time to reduce measurement error.

1 cent - $1 per group Ages 11 - 14 10 to 30 minutes
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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?

free Ages 6 - 14 10 to 30 minutes
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Yes, you can weigh your car by figuring out your wheel's tire pressure combined with the "tire's footprint." You'll need someone with a car, driver's license, and safety in mind.

free Ages 11 - adult 10 to 30 minutes
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In this activity, learners follow clues to find five puzzle pieces, then assemble them. This activity works well with a whole group, individuals, or families.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners create a map of a hidden surface using a "sounding stick" -- a technique similar to how underwater maps were once made.

Over $20 per group Ages 4 - adult 10 to 30 minutes
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In this online activity, learners use a realistic mass and spring laboratory. They hang masses from springs and adjust the spring stiffness and damping.

free Ages 8 - adult 10 to 30 minutes
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In this activity, learners use their hands as tools for indirect measurement.

free Ages 11 - 14 10 to 30 minutes