All you need. Nothing you don't.
Colleges and universities are rated on a number of criteria. A high rating comforts parents as they write out the checks each semester. One criteria is the faculty to student ratio, supposedly a measure of teacher/student interaction and intimacy. Another rating consideration is the average class size. The lower the ratio and smaller the class size, the better the rating.
Obviously, there is a parallel to small Christian groups such as house churches.
(In fairness to the traditional churches, it should be duly noted that Sunday Schools also allow and encourage intimacy.)
Cheers to the Lamb in whom are hidden the treasures of wisdom and knowledge!