5/10/09 - TORONTO, ONTARIO - Mitchell Brunning, of Toronto, has ADHD (Attention Deficiet, Hyperactivity Disorder. Brunning is involved in a number of sports, only one of which is mountain biking - which is actually part of his competitive skiing, off season trainning program. Although many kids are diagnosed with ADHD there is little formal trainning for teachers in the school systems. Rick Madonik/Toronto Star. (Photo by Rick Madonik/Toronto Star via Getty Images)
