Educational Resources Information Center (ERIC)
http://www.accesseric.org/

A Student's Guide to Research with the WWW
http://www.slu.edu/departments/english/research/

LEO: Literacy Education Online, St. Cloud State University
http://leo.stcloudstate.edu/

Britannica On-line
http://www.britannica.com/

Merriam-Webster Online Dictionary
http://www.m-w.com/

Dictionary.com
http://www.dictionary.com/

Word Central [2000 Webby Award for best educational site]
http://www.wordcentral.com/

Reference Desk
http://www.refdesk.com/

Research on the Net, SOFWeb, State of Victoria, Australia
http://www.sofweb.vic.edu.au/internet/research.htm