This publication by the World Health Organization focuses on enhancing pre-service training in mental health using the Mental Health Gap Action Programme Intervention Guide (mhGAP-IG). It aims to address the global burden of mental, neurological, and substance use disorders by expanding the mental health workforce, particularly for children and adolescents. The document provides guidance for educators and health authorities on integrating mhGAP-IG materials into existing curricula to equip future health professionals with essential clinical skills. It emphasizes a sustainable approach to workforce expansion and outlines a phased implementation strategy for educators. The document targets educational leaders, health professionals, and students in medical and allied health fields, advocating for improved mental health care delivery through comprehensive pre-service education.