THE IMPACT OF URBANISATION ON MENTAL HEALTH: Edited by Jair MariHow can schools be integrated in promoting well-being, preventing mental health problems and averting substance-use disorders in urban populations?Spanemberg, Lucasa,b; Salum, Giovanni A.b,c; Bado, PatríciabAuthor Information aNúcleo de Formação em Neurociências da Escola de Medicina, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS) bSection on Negative Affect and Social Processes, Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre cNational Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil Correspondence to Lucas Spanemberg, MD, PhD, Unidade de Internação Psiquiátrica do Hospital São Lucas da PUCRS – Av. Ipiranga 6.690, Bairro Parthenon, CEP: 90610–000 Porto Alegre, RS, Brazil. Tel: +55 51 333203041; e-mail: email@example.com Current Opinion in Psychiatry: May 2020 - Volume 33 - Issue 3 - p 255-263 doi: 10.1097/YCO.0000000000000591 Buy Metrics Abstract Purpose of review Mental health and substance use problems are among the most prevalent and challenging problems faced by both high-income and low-income countries worldwide. This review will focus on summarizing scattered evidence of school-based interventions to promote well-being and prevent mental health problems and substance use disorders in children and adolescents. Recent findings We focus on two main areas of research: promotion of healthy school climate and prevention of bullying. Choosing among available interventions might be challenging, both because of the difficulties in assessing their efficacy and tailoring interventions to specific needs, but also because of the scarcity of intervention in low-resource settings. We provide some guidance on principles encompassed by the available evidence that can be used for policymakers and local communities aiming to integrate mental health promotion and prevention into their schools. Summary Developing, implementing, scaling and sustaining school-based interventions is a necessity of our field if we want to move closer to sustainable development goals. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.