Blackcat, hope your DS is doing better! Thanks for that link; I actually read it earlier today. Totally sounds like DS.
So are you saying the school cannot deny a request for an IEP evaluation? The teacher and principal were looking me incredulously when I mentioned an IEP. I tried explaining how much scaffolding I am doing at home and the meltdowns. They were very supportive and recommended a 504 but not an IEP. I'm already quite stressed from experiences I am having with having to advocate for DD with this school, so I left it at that.