Time management may be the most important study skill. The effects of a specific teaching technique designed to alter the time management skills of undergraduate students in a voluntary study skills course were assessed. Of the 95 subjects, 34 were enrolled in the course and were exposed to time management instruction, 31 were future course enrollees, and 30 were on the course waiting list. All subjects recorded daily activities for one week on a Time Use Inventory, and completed the Self-Survey Index and the Inventory of Study Habits and Attitudes. No significant differences were found between groups on total hours of study time, social, leisure, and miscellaneous activities after time management instruction, or on the organizational scale of the survey of Study Habits and Attitudes. Results suggested that time management instruction was ineffective because actual time use did not improve. Students, however, reported that they felt the instruction had made a difference in their use of time. Findings also showed that females managed their time better than males and that senior-level students studied more than other students. (NRB)