I know this is sexist but I've seen it happen and heard it over and over again: If your "supportive person" happens to be a male wearing a tie, that helps. I hate it; but I'd be willing to do it if it helps.
We had a similar experience in 1st grade several years ago and I spent the whole year meeting with the teacher and the AP. Now, I wish I hadn't - I wish I had pulled him to homeschool or something else. I realize you don't have a lot of options in your situation.
I also suggest that you go to the school and observe the first grade teachers so that you can request one that you think will have a rapport with your son.
Is transferring to another public school within your district an option?
Hang in there; I know others will have more input than I do.
