I have just started seeing a private math tutor and am really hoping that it will improve my exam marks, i'll have to wait a couple of weeks to see. I have found that it has helped me grasp the concepts alot better and reinforces that that is learnt in class. My tutor and I don't work particularly ahead of the class, maybe half a chapter or so in front only. I go to him with homework problems, stuff i want re-explained, and currently we're doing revision for my assessment next week. However, for coaching colleges and class tutoring i'm not sure how it compares.