Since the inception of the World Wide Web, faculty members have been developing online course materials. However, there is little careful analysis of how students use these Webs. In particular, do more successful and less successful students use course webs and associated materials differently? Are usage patterns similar to those of printed resources, or do students explore materials differently on the Web? To answer questions like these, educators and researchers need tools that allow them to closely examine student use of Web materials. Building upon user tracking tools that gather information on student usage, including the time each reader arrives at and spends on each page, the use of multiple windows, and the links followed from page to page, the authors implemented Clio's Assistants, a customizable suite of tools that permits exploration of student Web usage patterns both graphically and textually. The graphical tools include simple bar charts, customizable directed graphs, and "replays" of student sessions. Textual tools include: simple statistical summaries, human-readable log files, database queries, and an advanced pattern matching language. Through these tools, one can identify and explore patterns of Web usage. (Contains 11 references.) (Author)