+1OK I'll bite. Whilst the role of the teacher is primarily concerned with the presentation of facts, it does not, IMHO, stop there.
The teacher can/should also create learning opportunities, or facilitate a journey of exploration, self-discovery and confirmation. After all isn't that what pre-school education is all about. In my personal experience, things I have researched, questionned and/or worked out for myself tend to stick better, especially if I can later affirm what I think I've learned with someone who knows, either by direct discussion or further correlation. So a good teacher provides the student with a way of learning...
Instead of "using the information discussed in class, analyse this passage with respect to how the walking bass creates various chord inversions at the cadences.", try "analyse this passage with respect to how the walking bass creates various chord inversions and note any other points of harmony you think might be significant."
IMHO a good teacher will teach you how to teach yourself and eventually become more of a coach than a teacher.