This paper addresses the need for educators and librarians to guide students in using the World Wide Web appropriately by teaching them to evaluate Internet resources using criteria designed to identify the authoritative sources. The pros and cons of information commonly found on the Web are discussed, as well as academic Internet subject or resource guides, search engines, and if and how Web sites are evaluated by search engines. A five-criteria evaluation tool for traditional print resources is applied to Web resources; these criteria are accuracy, authority, objectivity, currency, and coverage. Additional suggested criteria include content, organization, accessibility, and search capabilities. Citation of Web sources is covered, including MLA- and APA-style citations. Relevant Web sites are noted throughout. (DLS)