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Deutschland.de German Transportation Information
A German Government site with links to many excellent, up-to-date transportation sites in Germany, including information about trains, buses, cycling, automobiles, air travel, cableways, and ferries. Many of these sites are in both...
Khan Academy
Khan Academy: Protein Targeting
Learn how molecular labels are used to direct proteins to different parts of the cell and to the cell exterior.
TryEngineering
Try Engineering: Engineering Ups and Downs
Engineering design lesson plan examines the principles behind working elevators. Teams of students explore how elevators work, then design, build, and evaluate their own elevator to service a toy car garage.
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