According to the common sense a good student was a student that was doing everything he or she was taught in class. To challenge that could have been seen as bad. That student had to dress properly, be punctual, polite. Good grades too are very important, students with good grades usually are seen as the good ones.
The privileged were usually the white student, especially the wealthy ones.
My only question is what if a student is not punctual but has good grades? Or bad grades but listens to teacher? That brings some foggyness to the definition of a good student I think.