There is some evidence now that indicates exorphins in gluten contained in wheat, barley, and rye may have an effect on ADHD. More research needs to be done, but you might
try removing those grains from her diet temporarily (and substituting, nuts, seeds, and
more green vegetables to see if it helps).

I wish I could offer more, but it's a condition that needs much more research.

I very much agree with considering lawyering-up if you can't get a positive response
from management in the school system. Your child deserves the best attention and
care.