Attention Deficit Hyperactivity Disorder (ADHD) is a is a neuro-developmental disorder that begins in early childhood and is regularly seen in presentations at Child and Adolescent Mental Health Services. While ADHD is typically diagnosed by a paediatrician, child psychiatrist, and/or psychologist, the aim of this seminar is to provide some fundamental knowledge around the disorder to assist clinicians in recognising the signs within a mental health assessment.