Overview Learning objectives • Understand the mental health treatment gap in low-, middle- and high-income countries. • Understand the principles and aims of the Mental Health Gap Action Programme. • Acquire an introduction to mhGAP Intervention Guide (mhGAP-IG). • Learn about mhGAP ToHP training methodology and what to expect from mhGAP ToHP training. • Prepare group training ground rules. • Know the common presentations of mental, neurological and substance abuse (MNS) conditions.