My dance teacher is scary and ruining my body?

I go to a special arts school, and for P.E. we get to choose a dance class to do. I picked Jazz Dance because dance is my weak spot in theatre. I'm in Jazz 1 (easiest dance class) and although I am very uncoordinated, I loved it... last year. This year, I have a different teacher. He motivates by fear. He yells at us. He pushes us into split position. He makes us start the fifty sit ups all over again if he thinks we are not trying. He usually teaches the real dancers, who audition to get into the dance class. We are not dancers. Furthermore, he hates the people who can't dance as well, (aka me) and says we are not trying and puts us on the spot in front of the whole class. One time, I really hurt my back while doing something I couldn't do in his class. I went to the doctor, and the doctor said I should sit out for a while and told me she would fax him an excuse note. He said he never got it, so I just did the class. The doctor tried faxing him again, but he said that he didn't get that one either, so I danced for the rest of the semester. At the end of the semester, when he was handing back our work, he handed back TWO identical doctors notes. Recently my back pain has been keeping me up at night, and I recently went to the physical therapist. My hamstrings are really short and he has been forcing them to do things they can't do, therefore REALLY messing up my hips, pelvis, and back. I'm out of alignmentt, and it may stick with me for the rest of my life. My mom is calling the school counselor to try and transfer me to another class, and I'm giving him the physical therapist's note next class, but I'm really scared at what he'll do when he finds out we blame him for my injuries.