Both professors and teaching assistants can accomplish some of their most rewarding teaching in the office. For students who are highly motivated and those with difficulties, for those who are shy as well as those who are eager to talk, the learning that can occur during office hours should not be underestimated.
Students often say that they want to work harder for teachers they have gotten acquainted with.
Moreover, contact and candid discussion with individual students can help you gauge the situation of the rest. Instructors are generally expected to keep at least two or three office hours a week during the quarters in which they teach. TAs will probably need to schedule more time and should check with the professor to see how much. Laboratory assistants in particular can expect to spend about ten hours a week helping students during regular hours and arranged appointments. To avoid scheduling conflicts, you need to plan your office hours in advance.