The purpose of this study is to explore whether using an online patient portal plus a Care Manager is more effective than using an online portal alone in managing care for children with ADHD. Doctors at The Children's Hospital of Philadelphia currently use the online patient portal to help gather information from parents and teachers on ADHD symptoms, treatment, and medication side effects. The Care Manager is a person who meets with participants during the study to discuss their child's ADHD care. The Care Manager communicates with the child's doctor and teacher to communicate a parent's goals and preferences for their child's ADHD care.