An Autistic Perspective – Disclosing & Accommodations
While NeuroRebel focuses on Autism, her recommendations can be useful for any accommodation requests for the neurotypical or others in a work environment.
As for educational environment, in a college setting, there is usually an office that solely focuses on ADA accommodations, from my personal experience; however, I am unfamiliar with primary and secondary education. I would reference the actual ADA law itself for more information.
For a better understanding, sometimes the Wikipedia post can be useful. Just remember to always reference their sources, not Wikipedia as it is considered hearsay and not a valid resource since anyone can edit the page(s).