My DS has ADHD.
The reason we moved his school was because although the school actually brought this to our attention, and we followed it up by going to the GP and being refered to the peadiatrian, his teacher would send him out of class every single day because he couldn't sit still. He wasn't being naughty, he just couldn't stop moving.
Me and DH were haulded into the school on a regular basis about it, and even the Head was backing his teacher.
The thing is is that DS was sent out of the class with no work to do. He would stand outside the class room or in the heads offices doing bugger all.
This resulted in DS being a year behind everyone else.
When we moved DS, obviously we were worried that the same thing would happen. But it didn't. His teacher is wonderful, and even before he started his Ritolin, he was catching up his work.
Sometimes change is the best way to go.
Good luck Harman, I know how difficult it can be. ((((hugs))))