Archie is a 6th grade student who receives special education services under the autism eligibility category. Archie has a history of hyperactivity and problem behavior and was diagnosed with ADHD in preschool. In early elementary school, Archie’s parents and teachers noted social difficulties and rigid behaviors. They were concerned these difficulties were inconsistent with ADHD alone and would be better explained by another diagnosis. Archie received a diagnosis of autism spectrum disorder in second grade and began receiving special education support shortly after his diagnosis.