Tami,
I'd have to know more about the structure of the group reviews. It's possible that there aren't any reasonable accommodations for a student with ADHD/ADD with relation to the study groups. Perhaps a note-taker, the ability to record the session, etc. You would have to manage it on a case-by-case basis depending on what the student is requesting for accommodations and how the groups are facilitated.
Sarah Smoger