Professors may not always check completed homework, but they will assume you can perform the same tasks on tests. Teachers remind you of your incomplete work. Professors may not remind you of incomplete work. Teachers approach you if they believe you need assistance. Professors are usually open and helpful, but most expect you to initiate contact if you need assistance.
Teachers are often available for conversation before, during, or after class.
Professors expect and want you to attend their scheduled office hours. Teachers have been trained in teaching methods to assist in imparting knowledge to students. Professors have been trained as experts in their particular areas of research. Teachers provide you with information you missed when you were absent. Professors expect you to get from classmates any notes from classes you missed.