I was a student, and then an academic teacher in Europe in the late 90's. I mention Europe because the students were not any kind of "customers", but just plain

I was a student, and then an academic teacher in Europe in the late 90's. I mention Europe because the students were not any kind of "customers", but just plain students. I had classes where the teacher was a pain in the ass, at the middle or top of the medieval structure which was academia (this is one of the reasons I left). Their classes were very hard to show how brilliant they were. Usually the courses were crap. As a young teacher, I had all the more complicated graduates. By that I mean ones where physics was just a compulsory step but they build not care less. I was quite lax: if they learned the basic stuff, they passed. The better ones, who cared about the grade and made efforts had very good marks. And then there were the ones who did not even open the book and expected to pass because I wild not fail too many people. I did, had discussions with the dean, sometimes my decision was reversed. Weather a class is hard depends on many things and on the students. I had very hard quantum mechanics because they are, well, hard. I will not blame the teacher for that.