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Learners manipulate opaque, sealed boxes and attempt to determine their interior structures. Each box contains a moving ball and one or more fixed barriers.

$1 - $5 per group Ages 8 - 11 45 to 60 minutes
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This activity (on page 3 of the PDF under GPS: Biodiversity Activity) is a full inquiry investigation into biodiversity.

free Ages 8 - 14 1 to 2 hours
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In this lesson, learners are challenged to discover the relationship among six numbers.

free Ages 11 - 18 30 to 45 minutes
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Learners explore the physical properties of a variety of balls and how they bounce.

$1 - $5 per group Ages 11 - 18 30 to 45 minutes