Class sizes vary from twelve to thirty students, depending upon the subject and type of course being taught. Lecture courses, for example, tend to have higher enrollments than laboratory courses. For lab courses, educators sometimes may have to do their own set-up, if the department does not employ a laboratory technician. Some two-year schools hire their faculty with the possibility of tenure, whereas others offer only short-term contracts, typically for one to three years. Higher positions are in the administration.
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