This book addresses factors contributing to child and adolescent psychological wellbeing. On the intricate relationship between parental and teacher's autonomy support and adolescents' self-regulation and psychological wellbeing, it is written for parents, educators, scholars, researchers, and graduate students specializing in the field of psychology and counseling, particularly child and school psychology. Readers can examine the results from studies on adolescents' psychological wellbeing in different socio-cultural-economic contexts. It offers a practical model for parents, clinicians and other professionals seeking to apply this knowledge to real-life settings.