Attention Deficit Hyperactivity Disorder affects 8.4 percent of school-age children in the US. If you have ADHD, you already know what that means. It makes you restless. It makes it hard to focus. It makes it hard to stay focused, hard to pay attention, and hard to control your behavior, even if you want to. In 2010, we brought you a whole show focused on ADHD and its effects. We spoke with four San Francisco teenagers living with ADHD about how they managed from day to day.