Professors and other post secondary teachers specialize in any of a wide variety of subjects and fields. Some teach academic subjects, such as English or philosophy. Others focus on career-related subjects, such as law, nursing, or culinary arts. Post secondary teachers work for different types of institutions, and their job duties vary with the kind of organization they work for.
Some post secondary teachers are professors who work for large universities. In this setting, they often spend a large portion of their time conducting research or experiments and applying for grants to fund their research. Frequently, they spend less time teaching. Classes may be taught by graduate teaching assistants, who are supervised by a professor.