US Geological Survey
Usgs: Hydroelectric Power: How It Works
Check out this animated site of a hydroelectric generator. There is a picture of a real generator along with a description of how it works.
TeachEngineering
Teach Engineering: Water Power
In this activity, students observe a model of a waterwheel to investigate the transformations of energy involved in turning the blades of a hydro-turbine into work. Students work as engineers to create a model for a new waterwheel while...
Other
Ucs: How Hydrokinetic Energy Works
Description of how hydrokinetic power works including resource, conversion, and environmental issues.