Former Lecturer at UB - University at Buffalo, The State University of New York
over 2 years ago
It strongly depends on the department and type of class you teach.
If all class materials are provided to you, your job is relatively easy. You need to update lectures with current data, adapt the course to current events, and make sure that exercises and exams differ from previous years. For each week of class (assuming a 3 credit hour class), you can expect to spent at least a day preparing if you have never taught the class before. Exam preparation and grading times depend on your exams but increase the work load substantially for short periods of time. Student management (office hours, emails etc.) generally do not take up much time on average but tend to cluster around exams and the week before final grades are due. A clear and detailed syllabus answering questions takes quite some time to prepare but reduces student management tasks substantially.
If you have to develop a course including readings, exams, and lectures you will be more busy depending on your familiarity with the topic. Classes without textbook use will require a substantially longer preparation time