But I wonder if having the addition of a physical disability - the EDS ... will help. Point out to them it's not just a brain/neurological problem, he has a physical condition too (and the physician sent a letter to the school saying keyboarding was medically necessary)
You have what you need to get the keyboarding accommodation - you shouldn't need anything more at all than the physician's letter. If they try to argue that, they are simply trying to intimidate you - don't be intimidated. Keyboarding is a *very* common accommodation. It's not one you should have to fight for (no matter what your school tells you).
Using specialized software gets more complicated. If you had something written up by a private professional, it might help, or it might not. We paid for a private AT report, and it was helpful for *me* because it gave me a ton of ideas of things I could try for ds - but the school scoffed at it. Note - the actual AT specialist didn't scoff at it - she was really interested in what was recommended - but the IEP team etc didn't put any credence into it because it was done outside of the school, and any AT provided by the school needed to be evaluated through the school district AT eval process.
I know I keep mentioning free resources but... fwiw... another resource I found in our community (also found through wrightslaw) is a group that provides technology evaluations for people with disabilities. They generally don't work with students simply because they are Federally funded and there are other Federal funds directed at AT in school - but .. they were wiling to answer questions for us, give us advice, and let ds try out software etc at their office because we were not being helped by the school. We still ultimately had to purchase what we wanted for ds, but being able to go in and try out different software packages and apps etc was really helpful.
polarbear
