Professor Violations what to do?

First, I would like to apologize if im posting in the wrong section. The nursing school that I am going to handles problems very unprofessionally. In fact, it has been known that students who "rebel" against professors and related staffs are kicked out of the program. The problem is that there is a professor who teachers 3 core nursing courses and she is very unprofessional. She favors students, puts material that isnt discussed and she tells her favorite students other student's grades. Multiple students in the past have complained to the dean and vice president of the school about her, but there hasnt been much change.

When nursing students first began attending the program, we had to sign a contract. I was wondering if there is a policy or guidelines that professors are suppose to follow? I've already invested so much time and money into this nursing program and almost half of our nursing class either dropped or are failing because of the professor. Is there anything that can be done?