Ok, I have read the whole thread.
Star...I think you're quite right to rethink some of your phrasing. 'The child with Social Communication problems' is what we all fight our children being known as. I know you know that, but it did shock me, so it's worth saying.
I also think that it's quite possible that the placement was either random, or that there were other children the teacher couldn't sit the child in question next to (don't forget that they get info from nursery).
Next, I can see the complexity of the situation with your unique 'rules' at home, due to the ABA programme and general needs of your DS, but actually I think perhaps we are doing your 4 year old NT girl a bit of a disservice, here
She is bright, used to following rules - she is more than able to learn a variation to the rule according to situation. Even my dog knows that under no circumstances is he allowed under the covers, except once DH gets out of bed
, for example.
I do understand though, how odd it is in the NT world when your firstborn has SN. We are so used to having to micro-manage every situation, every setting they attend, every stage, that it's quite disconcerting to suddenly be almost a spectator of your NT child's education.