netTutor from Ohio State University is the most complete guide we have seen and thus receives our highest recommendation. Not only does this site provide information on how to evaluate web sites, but insights upon how to cite web sources, how to get started using the Web, smart net research strategies, and a complete tutorial database.
The Internet Detective: Wise up on the Web “is a free online tutorial designed to help students develop their Internet research skills. The tutorial looks at the critical thinking required when using the Internet for research and offers practical advice on evaluating the quality of web sites.”
Internet Tutorials from University of Albany Libraries