Thank you.

We tried to talk with people in charge but all of them dismissed us.
There's nothing I can do to change the teachers evaluation...who can prove that he gaves us the grade based on a very subjective opinion? And he won't quit.

And there's nothing I can do to punish him. So every discipline has to give students a second oportunity to be evaluated, if we want to improve the grade. How I can't repeat the practice, all that left is an oral evaluation... Now I just want to prove myself that I can be good and his evaluation doesn't have an effect on me. So, guess I will have to find some time on my busy schedule to study for this, my grade can't be worst.

I think the best way to get my revenge is to show him I am good and his opinions are ******. And after that I will left bad opinions about him everywhere I can. After all I am a better person than him.