How to talk to kindergarten teacher

My son is 5 and started kindergarten at the end of August. The first few weeks went great; he told us every day how much he loved kindergarten.Then he started complaining about one of the girls at his table. Every single day he had something to say about how annoying she was or how she messed him up on this or that. I volunteered in the classroom one day and I saw how much she bothered him and goofed around and distracted him. My son knows her from preschool and had problems with her last year, although in preschool they were never made to sit near each other and interact regularly.Now, more recent yet, my son has started complaining about school. He says that he is getting in trouble a lot and his teacher keeps asking him, "Do I need to have a talk with your mother about your bad behavior?" He was really upset this evening, telling me that he really tries his best, but she keeps telling him his "bad behavior" is unacceptable. He says he isn't even sure what he is in trouble for a lot of the time.I haven't been a fan of this teacher since shortly after the year began and I heard from my son and from some other kid's parents how she tends to be sarcastic and sometimes makes passive aggressive comments about or to the kindergartners.So I want to address with her how anxious my son is becoming about kindergarten, but I don't want it to come across as my problem being with her. I know that my son can be a troublemaker, but I feel like 1) he or the girl needs to be moved to a different table, and 2) if my son is causing trouble she needs to talk to me about it and not make empty threats about talking to me when she tells him his behavior is bad. via /r/Parenting http://ift.tt/2eI2S13