Most library Web sites offer lists of recommended Web sites for primary sources with only cursory summaries of the sites. While many of the resources listed are outstanding, too many are dubious in quality, often referring to dead URLs or sites containing no information on their sponsor, source of material, or other information needed to evaluate the accuracy of the information being offered. As student researchers use the Web more and more as their sole means of obtaining primary sources, they need to know how to evaluate the quality of a Web site. This paper discusses a five-step method for evaluating Web sites and uses this method to review several Web sites offering primary sources on United States history.