Can you sue a university for retaliatory conduct (grading)?
you can sue anyone for anything. that is the great thing about the US court system. as long as you have evidence your golden
Can you sue a university for retaliatory conduct (grading)?
You can't take her to court just because of the low grade. But what she did was egregiously unprofessional. Universities often have a code of conduct that applies to everyone, not just students. I'll bet she's violated that code somehow. Look on your school's website for the code of conduct. All schools have them in one form or another.
I would file a grievance with the appropriate dean. Professors have a lot of latitude in grading, but that is a COMPLETE abuse of authority, if she did it solely to punish you.
She shouldn't be teaching.
I don't think you can sue them, but you can ask a person that is over that teacher to review your grades if you think they are unfair..