http://www.abctales.com/
Poetry and stories. You can publish your own writing here.

http://www.mdx.ac.uk/www/study/
Andrew Roberts Home Page. Social science history, mental health history,  general study guide; also poetry and much more.

http://www.geocities.com/TheTropics/Paradise/2385/
About Snails and Slugs --- Also North Wales and a dog called Belle. By David
and Kathleen Kirwan.

http://www.netcyclo.co.uk/index.htm John Anderson is creating an encyclopaedia on the net. 100 items mostly on astronomy and geography but also one on the Millenium Dome. John invites contributions from others on any subject. Factual, accurate and simply written.

 http://www.howstuffworks.com/
A commercial site, covers animals as well as cars and computers.
The article "How Spiders Work" was informative- this site is large but not encyclopaedic.