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In this math lesson, learners use hinged mirrors to discover that regular polygons are composed of triangles tessellating around a center point.

1 cent - $1 per group Ages 8 - 11 1 to 2 hours
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These three short activities challenge groups to fit objects through paper and index cards: "Slots" presents the challenge for one learner to figure out which objects fit through a hole cut by another

1 cent - $1 per group Ages 4 - 14 10 to 30 minutes
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In this activity, learners explore geometry and spatial relationships as they figure out how to arrange tables for a party.

1 cent - $1 per group Ages 8 - 11 10 to 30 minutes