Teachers are available before, during, and after class. Professors have regular office hours and will see you by appointment. Teachers often link all class work to the textbook. Professors often assume that the textbooks are background information. They may expect you to make your own connections between lecture material and textbook material.
Teachers usually grade homework.
Professors seldom grade homework. You often have the opportunity to do extra-credit projects to raise your grade. You seldom have the opportunity to do extra-credit work. Teachers have formal training in educational methods. Professors have formal training in their subject area.