Attention deficit hyperactivity disorder (ADHD) is a commonly diagnosed behavioral disorder in childhood. Symptoms of ADHD include developmentally inappropriate levels of activity, distractibility, and impulsivity. The behavior often leads to academic and social problems and may have a long-term adverse impact on a child's later life. This document is a literature review of the nature, clinical assessment, and treatment of children with ADHD, noting the treatment utilization of quantitative electroencephalography (QEEG).