I have felt the same way ... again and again and again. I feel like a total failure, but I decided that continuing to bang my head on that wall would get me nothing but a concussion, so I stopped.
Instead, with each new teacher I try to explain DS's needs ever so gently, then tell them a few little tidbits that worked in the past (like alternative spelling words, permission to move to an isolated seat when the distraction is too great), and then, if those are implemented and somewhat successful, I might be bold enough to ask for one more tiny morsel of accommodation.
And by that time it's spring and none of them care anymore because it's almost the end of the year.
(I know, not helpful. But at least you know you're not alone.)
