Watch this whole video. If you get distracted rewind it and really watch it.
This is a concern to me as I have seen kids diagnosed with this within minutes just from a few questions by a doctor. I have had adult students that are diagnosed with this condition. Through the Kali Method their attention span as increased and more in control of themselves. There are no proven facts however I know that through the honest interest I have for my students, the exercise, and diet suggestions there have been results. In other words I'm sure there are better ways of dealing with this then to just put the kids on medication immediately.
Saying this I feel any form of group camaraderie activity with function, love for each member, mental and physical exercise can help. (Again my opinion.)