We propose to do this with a single site, ten week, pilot study of 40 school age children, ages 6-17, with Attention-Deficit/ Hyperactivity Disorder (ADHD) and moderate or greater impairment (C-GAS < 55) who show ADHD symptoms despite a trial in the community with their primary care practitioner with either of two of the most commonly used stimulants (i.e., either OROS-MPH (Concerta) or mixed salts of amphetamine (Adderall-XR)).