psychcentral.com - Kids with attention deficit hyperactivity disorder ( ADHD ), a neurobiological disorder characterized by inattention, impulsivity and hyperactivity, tend to have a harder time in school because of the disorder.“Research suggests that children with ADHD exhibit deficits in cognitive and achievement testing, lower grades, and an increased use of special education services in comparison with the general population,” said Jacqueline Iseman, Ph.
