While this may seem unfair intuitively, I want to know whether if it is fair for a professor to have an extra question for specific students in the class.
A little background: In a calculus class, 3 out of a 16 ish students have taken calculus before at their high school, but the university requires them to take a similar class as per the university's rules. The professor knew that they had calculus, and so, during a quiz, he assigned them an extra question, and everyone else didn't have that question on their paper.
Now, it wasn't an extra credit problem, yet, it was graded as a normal problem.
So my question is, can the professor exclude those specific group of students and assign them an extra problem on a test or a quiz?