It's rude to interuppt teachers while in class.
Missy is listening to her instructor give a history lesson on World War 2.
Missy wants to ask a lot of questions.
Missy asks the instructor her questions after class.
Missy asks the instructor her questions one after the other.
Missy gets her answers and the other students are able to hear the entire lesson and learn a lot.
The instructor's class time is spent catering to just Missy and the other students don't get to hear the whole lesson.