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When baseball was in its infancy, the ball had plenty of bounce. Today's baseball may not seem to have bounce to it at all; if you drop a ball on the field it won't bounce back.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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Learners combine counting, multiples, and number patterns with jumping up and down. To start, pick a counting number.

free Ages 4 - 14 5 to 10 minutes
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This is an online activity about acceleration. Learners will choose a speed and an angle in order to help a water-skier named Fonzie use a ramp to clear a shark.

free Ages 11 - 14 Under 5 minutes