Alternative Energy Links
Centre
for Alternative Technology, Mach, North Wales (highly recommended)
This site is a must. Europe's leading eco-centre. The Centre's 40 acre site (seven acres on public display) has working examples of wind, water and solar power, energy conservation, environmentally sound buildings, self build, organic growing and alternative sewage systems.
On-Line
Renewable Energy Education Module 
Good general introduction and specific detail of applications, theory and case studies for each type of energy, particularly solar. Try link on solar flat plate.
Kids' Page Office of Transportation Technologies, U.S. Department
of Energy. This webpage is meant for younger students who want to have fun
learning about alternative fuel cars and helping the environment.
http://www.ott.doe.gov/kids.html
There is also this site (http://www.energy.ca.gov/education/) - a great starting point for younger scientists wanting to know more about alternative energy through a simple explanation of how they are using it in California.
Energy Efficiency and Renewable Energy Network (EREN). This website provides a list of
various websites that address energy education http://www.eren.doe.gov/kids.html
Energy Efficiency and Renewable Energy Network (EREN). Roofus leads
kids on a virtual tour of his energy-efficient house to learn about renewable
energy and energy efficiency. Recommended for grades 1 to 4. The website also
contains activity suggestions for teachers for grades K-12.
http://www.eren.doe.gov/roofus
The Sun's Joules - Center for Renewable Energy and
Sustainable Technology. Multimedia encyclopedia on renewable energy,
appropriate for middle school students to adult.
http://
solstice.crest.org/renewables/SJ
Aurora Educational Web Site on Renewables. A fairly advanced site for older students.
CENSOLAR - Contains useful links in Spanish