I have personally had this problem. Before you take your complaint to a higher level, first discuss it with the teacher. Make sure that this is not verbally confrontational. Employ the guidance counselor to also be present at this meeting. Begin by, " I understand that little Jimmy is having a lot of problems in your class and I am concerned". Go on to ask the teacher blatantly what the problem with his behavior, schoolwork, or whatever he is being penalized for is. If her claims are legitimate, ask what she recommends and be willing to hear her out. I say this because sometimes even the most angelic child can be a devil at school and there may be more going on. If you were right on your hunch, after the meeting then you should request that your child be moved to another class, depending on the school this may be arranged through the guidance counselor. You are not required to give her a big explanation. Simply state that you are uncomfortable with the current situation and feel that your child could better benefit from instruction with another student, However, keep in mind that it is better if you can settle the situation without having to change teachers. When this occurs, the child may be singled out by other teachers as a bad apple that the parents overindulge. I've seen this a dozen times in small school districts. There are a few procedures that should be followed if you do need to take this to a higher level. Start at the school with the teacher, guidance counselor, principal, local school board. You can get some results and children being picked on by teachers does happen more frequently that many parents may believe.

Why do you feel he/she is being picked on by teachers? As a guidance and counseling teacher I actually see most of these claims are untrue. (I said MOST, so there are some legitimate cases). I've seen parents defend their children when they behaved like monsters (talk trash, disturbing the class, bring pornography to school, etc). I've also seen smart dilligent student show terribly disrescpectful behavior toward the teachers. Talk to several teachers who teach your kid and ask their opinions. Talk to your kid's friends. If they say the same thing, you do know that the teacher are not just being mean to your kid. Be objective. Even the sweetest kids can behave badly in certain circumstances, such as being provoked by friends. Ive had 3/4 of the class students played strip poker in class, boys and girls at the 7th grade, even the most behaved students.

If you have legitimate case with proof, talk to the principal. The teacher might get warning and reprimand from the principal but I;m not sure you can move him/her to another class. I don't know the rule in US, but in here, unless you have strong argument, your kid will not be assigned to another teacher, or everyone will ask such favor (and I mean everyone).