Kevin, a bright, enthusiastic second-grader, has tremendous difficulties in school. He can’t seem to pay attention to his teacher’s instruction, gets distracted easily by activities around him, has trouble staying still in his seat, and often bothers his classmates by talking to them during work time or calling out without permission. As a result, Kevin gets very little work done and is getting increasingly further behind in math and reading. Kevin’s teacher and parents are very frustrated and blame each other for Kevin’s difficulties. Unfortunately, Kevin’s situation is very typical for children with attention-deficit/hyperactivity disorder (ADHD); a condition that affects between 5 to 10% of students in the US.