Distance learning and disabilities

In following our reading and discussions about distance education I can't help but think of my youngest brother. He is in highschool and has ADHD. In spite of being very smart he has difficulty following a traditional class in which he has to listen to a lecture or participate in class discussion. After he failed Algebra II my parents signed him up for an online course through a university and he is doing great. He is able to work at his own pace and doesn't have to worry about missing verbally delivered information because he spaced out. I don't think a webinar would work for him though. The webinar seems more of a format suited to distance issues rather than alternative or special education needs.