Course management software and on-line course material are becoming more available. As a result, many instructors have developed WebCT course Web sites to deliver on-line course material that supplements lecture topics. The present study examined associations between student characteristics, course performance, and access of Web-CT course material. We tracked and coded patterns of Web usage by 154 students in a Psychology as a Profession course. Frequency of student access to Web-based material correlated positively with grades on course assignments. Females accessed the home page more often than males. Self-reports from students evaluated the course Website as highly valuable. These results suggest important advantages in supplementing lecture courses with on-line material. (Contains 3 tables.)