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In this geology activity, learners create a model using a mixture of salt and sand inside a CD case. When the case is tilted or inverted, the mixture dramatically sorts into a layered pattern.

$5 - $10 per group Ages 11 - 18 1 to 2 hours
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In this activity, learners walk the sides and interior angles of various polygons drawn on the playground. As they do so, learners practice rotating clockwise 180° and 360°.

1 cent - $1 per group Ages 11 - 18 5 to 10 minutes
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In this activity, learners follow simple directions to explore and create platonic solids.

1 cent - $1 per student Ages 11 - 18 30 to 45 minutes
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In this math activity, learners observe and sketch cracking patterns in pavement.

1 cent - $1 per student Ages 11 - 18 10 to 30 minutes