Do kids in top magnet middle schools ever get F's?

Yes, even in top schools some kids fail classes.

Schools tend to grade on curves, meaning that most people will score in the middle, with a few at the top and a few at the bottom. Of course, someone has to have the lowest GPA at the school, and that person will be at the very bottom of the curve. That being said, a person who fails at a top school may not fail if s/he is placed in an average school.