I might be off base here so feel free to ignore this, but could it just be the lack of/inconsistent use of accommodations?
I always thought of ADHD being the fall back when other things were ruled out. I copied this from the DSM V
However, ADHD symptoms must not occur exclusively during the course of schizophrenia or another psychotic disorder and must not be better explained by another mental disorder, such as a depressive or bipolar disorder, anxiety disorder, dissociative disorder, personality disorder, or substance intoxication or withdrawal.
If he has accomodations for EDS and anxiety and they are not being followed, I would not keep looking for more explanations.
It sounds like his teacher is the one with the "attention problem". She isn't following directions or doing her work.
Grrrrr....from a fellow EDSer.
