A number of teachers use the "explaine it like I know nothing rule" you see this in MS and HS. They use this to force most students to do a better job of discussing or explaining a topic. Most teachers teach to the 80% rule and have devloped technigues that they belive should work for all. A rare teacher understands that each student should be treated fairly, but not equally. It sounds like you have one that misses this. Also its hard to challange the king in there castle. I belive its time to move up the ladder on this issue.