The reasons for the emergence of a desire to change, the teacher might be several. The most common one is extorting money. If the teacher from the first lesson suggests that to pass his subject will be the only one who will give him anything or provide material support, it has no place in the education system.
The second reason for rejecting the teacher disrespectful behavior towards students. Despite the fact that the teacher still needs to be in charge because he's older and more experienced, he has no right to humiliate students or be rude to them. Some young teachers are particularly peculiar especially to "encourage" students, using their privileged position – so they show their superiority and amuse his own ego.
The reason may be his lack of professionalism (talking about some teachers you can really say that they know less than the students, despite the developed system of control of knowledge of the teachers) - your knowledge does not have to suffer from it.
To refuse the teacher will have to collect signatures of all those who disagree with his methods students. Of course, many are afraid to sign such a request – because the teacher can not change and then everybody will have hard times. However, you will convince classmates or parents other children, if it happens in school of the necessity of collecting signatures. Explain to them that "one in the field is no warrior". Only mass protest against the behavior of the teacher will help to achieve replacing it.
The first instance where you have to apply, after the written statement is the school Director's office or the Dean's office. Attach to the application a list of signatures collected. If the Director or Dean shrug and refuse to do anything, write a letter to the Ministry of education by electronic or conventional mail. The response to your complaint should come within a month.