[Jipazgqmnm]

Just a little empiricism: During my studies, 95 % of the teaching was somewhere between "not good" and "horrible / comically bad".

There were just one or two persons in the whole faculty known for good teaching. This was acknowledged by all students I came in touch with.

--> There is a kind of teaching that is uniquely perceived as "good" among the people I came in touch with.

The same holds for teachers known for really bad teaching.

That written, teaching _was_ mostly perceived binary.

There was fairly little overlap where teaching styles were perceived "good" from some and "bad" from others.