stressing trivial points of learning; lacking a sense of proportion in scholarship; narrow-minded teacher who insist rigid adherence to a set of rules.
pertinacious
stubborn; unyielding; holding firmly to some belief.
pontifical
ornate; stiff; having the pomp and dignity of a high priest or Pope.
pretentious
making claims to some distinctions; showy. Pretentious people put on airs, try to appear more important than they are.