Individual or small-group teaching is provided by the College in the form of supervisions. Students and supervisors work closely together, discussing work prepared in advance and clarifying any problems encountered in lectures or reading. Typically, you will have between one and four supervisions per week. Each supervision is about an hour in length and is attended by you, your supervisor, and sometimes one or two other students. Your supervisor may be a Fellow of Trinity Hall or another College, and may even be the person delivering the current lecture course in the Faculty!
Your Director of Studies (frequently abbreviated to DoS) will be responsible for organising your supervisions, and for taking care of your academic welfare in general; whether advising you on what courses to take, what lectures to attend or addressing any work-related problems you might have, your DoS is always at the end of an email.
Every graduate has a Mentor, a member of the Fellowship or Senior Member in the same general academic area, who has expressed a willingness to get to know grads in their field, socialise and be available to discuss academic issues that may arise while in Cambridge. They can provide an experienced perspective when strategic advice is needed, or practical advice to the academic demands made on students by Cambridge University.
Graduate students studying for a research degree will also have a supervisor assigned to them by the relevant Department.