Belle -- I'm so, so sorry you're going through this. It's *exactly* what happened in our multiple meetings about ds-now-8 when he was in K -- he was becoming a behavior problem and the school *refused* to realize that it was because he was sitting in a classroom for 7 hours a day and not learning a thing. They shot down all our research and withheld MAP test information until it was too late.
And at 5 or 6 or 7 or 8yo, what little boy has the maturity to deal with stultifying boredom to prove himself to The Man? Precious few. It's appalling.
I'm fuming *for* you. Can you continue to homeschool? Are there any good private school options? We moved ds to a private GT school and he's a completely different child there. It's a considerable financial strain but completely worth it.
