Vince wrote:
Just say "I find the patronizing way you speak to me rather insulting."
I think that's a great idea.
You should write to her, just as you have to us.
How about something like,
"Dear Miss....
I am writing to you because I'm finding your lessons very stressful. I know that I'm aspie, but that doesn't mean I'm stupid. I find the patronising way you speak to me rather insulting. It makes me look foolish to the other children and that makes things hard for me.
I know you might not be used to teaching people with autism, but you are over compensating. It's making me very unhappy in your class, and I can't talk to you easily about this, which is why I'm writing. I hope that you will start treating me with more respect. Thank you."
I would also send a copy of this to the head teacher, head of department, etc.