While in College, did you ever correct the instructor on some of the facts they were teaching?

Question

I did that once in college algebra, the instructor gave me such a dirty look. Never did it again.

Answer 1

I am in University and I do it all the time. Of course I am 30 years older than the professors so I can get away with it. If they make a mistake they are pleased when someone points it out to them. Your instructor must have been a  real jerk,

Answer 2

In English I question or challenge (bad form to correct) the teacher.  I have had lots of fun this way and have gotten very good grades.