This book discusses teachers’ mental health applying a whole-school approach. Addressing the current teacher recruitment and retention crisis that many countries in Europe are facing, the author discusses the stressors and challenges teachers experience regarding workload, behavioural management and engagement concerns, managing parental expectations, governance issues from governmental agencies, and access to appropriate mental health resources to mitigate some of these. A timely resource, this book explores protective factors for educators psychological well-being, such as teachers social and emotional competencies, as well as contextual determinants like the quality of staff relationships, teacher-student relationship, school climate, and school belonging. Its scope extends to practical applications of large-scale European school-based projects in this area, providing readers with evidence-based examples of successful mental health initiatives. Bridging the gap between theory and practice, the book equips educators, researchers, and policymakers with the knowledge and tools to effectively address and enhance teachers’ mental health and well-being.