This Think Quest 98 award winning site provides information to students about the different methods of energy production currently in use or in research. In addition, it discusses the history of energy's influence on man, presents how energy is currently being used, and introduces energy from a physics point of view. There's also an interactive game and public message board at the site. Eric's Treasure Troves of Science Extensive on-line encyclopedias of math and science. Each section is browsable alphabetically or searchable by keyword.
Entries have a concise explanation as well as cross links which can be quite extensive.
How Light Works Designed for elementary students, this site introduces important concepts related to light and its various properties. An index and a search engine make it easy to find what you're looking for. Articles are written reasonably clearly and there are plenty of images and pictures to assist in the explanation, but teachers should note that the language level and the use of terminology may put them beyond the ability of younger or beginning science students to understand on their own. This site can serve as an encyclopedia of Physical Science terms and concepts. Optics for Kids A quick look at some optical basics.