The purpose of this investigation was to examine the kinds of things males and females do on their first co-operative job, how they perceive their working conditions and responsibilities, and how their performance is viewed by their employers. There were 272 college students in the sample. Sexes were fairly evenly represented, but the male-female ratio differed by curriculum and job placement. Students' workday activities information was collected on a student placement log and supplemented by a student questionnaire. The final instrument was a supervisor's evaluation checklist. A comparison of what males and females do on a typical work day did not reveal many differences. Most students of both sexes viewed each thing they did on the job as an appropriate activity. Supervisors tended to rate females higher than males on general work habits and compliance with company policies. In most cases supervisors tended to attribute similar personal characteristics to male and female students. An interesting comparison is that of students' self-assessment of their abilities in relation to supervisors' ratings. More males than females felt competent in most work activities. In contrast, when supervisors rated performance on many of these same activities, females were usually rated as having done better than males. (CSS)