I have encounterd several challenges with students.  #1.  Student insist that I am the only one that can help her pass a class that she cannot fail again.  Requesting that I find 3 extra points for her.  Listened to her, remediated her prior exams with her.  Informed her that it was unethical to maniputale her grades and unfair that the other students grades would remain the same.  Advised her to file a grade appeal with request to retake the final exam which was denied.  She sent the apapeal to higher authority and gave an explanation why she should get credit for some of the incorrect answers on her exams.  When all efforts to resolve the conflict, offer the student the policy and it's instructions.  She did attempt another appeal with the Dean and was also denied a grade change or request to take the Final Exam again.