Just glancing at the New York Times article on ADHD and I have been wondering this for a long time. The single biggest problem my children have is focus. Which is a bit crazy as we have short class periods.
The worse group is been my robot kids. I continually have to remind them to pick one task, think about it only, and finish it. They wonder off to other robot tasks, other tasks, and then to completely inappropriate conversations for the classroom. Makes me nuts.
Wish the lower grades had taught them skill before sending them to me.