In the U.S., nearly 10 percent of children between the ages of four and 17 are diagnosed with ADHD. More and more of these children are prescribed medication, like Ritalin, because it is supposed to calm them down and improve their academic performance. About 2.7 million of those diagnosed with ADHD are prescribed some kind of medication, according to the Centers for Disease Control and Prevention. But there might be a less invasive way to help them. Recent research suggests that a little bit of exercise helps children with ADHD to improve their focus and academic performance. Now that many schools are currently cutting P.E. classes, this is important research to take into consideration.