This document discusses adolescent mental health and development. It defines adolescence as the transitional period between childhood and adulthood, characterized by rapid brain growth. The adolescent brain develops in all areas as grey matter increases and pruning occurs to strengthen connectivity. While memory, language, reasoning and social skills improve during adolescence, difficulties with emotion regulation, reward-seeking, planning and an obsession with self can also occur due to neural and hormonal changes. Many social and organizational factors impact adolescent mental health and present barriers to receiving needed support.