The Library Homepage provides links to sites which contain a variety of sources for evaluating web resources. One of the most cited resources for evaluating resources is Esther Grassian's from UCLA . I have found the Widener University site, created by Jan Alexander and Marsha Tat, especially useful for helping students understand some of the criteria to apply to web sites. I also recommend the University of Georgia site, developed by three members of the Department of Instructional Technology, which contains a good checklist to review before adding a link to your own webpage. Don Descy, a professor at Mankato State University has created a wonderful web site which demonstrates how easy it is to present bogus information as legitimate.
Some publications regularly review internet resources .
These are often useful in finding quality sites for a subject area.