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Guess My Number
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In this math activity, learners play a game similar to 20 Questions, in which learners must identify a secret number drawn from a bag.
Number Flips
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In this math activity, learners play a number game to explore the relationships between numbers, combinations, and the concept of equivalency.
Penny Estimation
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In this math activity, learners estimate how many pennies are in a jar by predicting and counting handfuls of pennies.
How Many In a Minute
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In this activity, learners will keep track of how much they can do in one minute. Instructors can pick something everyone will do for a minute, such as jumping up and down or drawing stars.

Exploring Size: Scented Solutions
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This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).
Finding the Right Crater
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This quick demonstration (on page 11 of PDF) allows learners to understand why scientists think water ice could remain frozen in always-dark craters at the poles of the Moon.