Ok, hope there are enough buzzwords in the title to get someone looking at this! 
It is a serious post though, and I hope you can stay with it as I don't want anyone saying I haven't given a full picture of teh problem.
My son is nine and in year 4 in mainstream. He has diagnoses of Aspergers, ADHD and dyspraxia. He is is fully statemented with full time 1-1 help. He has many problems. To make matters worse, he is also under the care of a geneticist as he is srongly suspected of having neurofibromatosis 1, which could mean that when he hits puberty, he could well end up covered in disfiguring tumours with some pretty grim consequences. He is short for his age, can't run properly, ride a bike or walk long distances due to dyspraxia and low muscle tone. He can't write so anyone else can read it, he is so impulsive he cannot attend after school classes, and he also has difficulty with speech clarity due to the above problems. He has communication difficulties typical of autism and has been picked on in the past. . We are told he is 'popular' at school, but he is never invited to play at anyone's house, even though we invite children round, and he hasn't been to a birthday party in two years, despite us paying for children to go the cinema, see an entertainer, have pizza out etc for his party, and my assiduous courting of the parents of children he likes and who seem to enjoy his company. I would say he appears around two years younger than his real age. He is aware of most of the above and it upsets him, especially when he sees his NT sisters having a lively social life, getting certificates at school etc.
I work very hard trying to teach him communication skills, modifying his behaviour and teaching him coping skills. But I also work hard to raise his self-esteem. Like many nerdy aspies, he has always been very bright. He could read fluently at three, and loves books. I have always tried to encourage this and he is proud of his abilities in this area. He is lucky enough to have a great teacher this year, who really seems to 'get' him, but this teacher only does four days in the classroom, and another teacher, who does not seem to 'get' my son stands in.
Now, this is the crux of the matter. My son told me that last week, a girl in my son's class told my son that another child was 'in the red group, and you are only in the orange group .' My son said, 'It doesn't matter' and she said, 'yes it does. It means she is better at reading than you' to which my son replied, 'No, I'm the best reader in the class'. My son tells me that at this point, the teacher intervened, told my son, 'you used to be the best, but now you are only around the fourth best', and then called a group of children to stand around the class computer while he pulled up the SATS results (I assume) and showed them that another (named) boy in the class got a level 3.5, and that my son only got a level 3.
If this is true (and it seems an extraordinary story to make up) I think it is so wrong. For one thing, we were told at parents evening after the SATS that even parents wouldn't be told their own child's SaTS results! So to pass this information around with the express purpose of humiliating a child with pretty severe special needs seems extraordinary to me. OK, you don't want a kid saying 'I'm the best reader in the class' whatever their problems, and I instantly told my son that he shouldn't say things like this, but my little boy has so many problems to face in life, and he has so little to be proud of, and I am horrified that a teacher would do such an hatchet job on his self-esteem. I would have thought saying something like, 'There are lots of good readers in this class, you are all doing really well, we all have individual talents and we should't compare ourselves or anyone else with other people, but just do our best', and then moving on would have been better than this big performance with the SATS results. I am not steaming in all guns blazing, and have sent my son's class teacher an extremely polite email asking him to check the story and let me know what really happened etc - but if this did occur as my son says it did, what should I do? Is it OK for the teacher to do this? And why, if my son is slipping at school, haven't I been told? My instinct is to pull my son out of school and hire a hit-man, but obv I will restrain my instincts! Please help! (and thanks for sticking with this marathon post!)