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Interactive
PBS

Pbs: Sesame Street: Science

For Students Pre-K - 1st
A collection of interactives, videos, and documents on a variety science concepts.
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Lesson Plan
Cornell University

Cornell University: Cornell Center for Materials Research: The Physics of Bridges [Pdf]

For Teachers 9th - 10th
Students incorporate their knowledge of civil engineering and physics principles as they design and build a bridge within certain parameters while choosing their own materials.