Tommy is in his room reading his homework and trying hard to pay attention. His mom, Janet, has walked by three times in the last fifteen minutes; each time catching him not doing his work, but staring into space or playing his video games. She's been aware of his short attention span since he was in kindergarten, but she always figured it was a typical problem for kids his age. But now he's in third grade and the problem hasn't gone away. His teachers have started calling Janet and complaining about his hyperactivity during their lessons. "He refuses to raise his hand and has problems…
