Professors that don't explain things when you ask are so bogus

If someone asks for a professor to explain how they got some number, "you should figure this out for yourself" is not an appropriate response. I come to class to learn and get comfortable with the material, not to be told that I need to study and figure it out outside of class (which I already do).

You have to teach, not write stuff on the board and expect us to get it.

/rant