The future of every society in the world depends on teachers. Teachers impact children in a myriad of ways, from teaching the lifelong skill of how to learn, to the practical skills to navigate daily life and to modeling healthy, respectful interactions. To optimally teach children, we need teachers with strong wellbeing. Wellbeing is associated with doing well for others, striving, coming up with creative solutions to problems, and socially connecting. Our children need this full effort from teachers. This report covers two large endeavors. The first endeavor was a scoping literature review of 102 journal articles worldwide on teacher wellbeing for the five-year period of 2016 to 2020. The second endeavor was a set of case studies involving original, in-depth interview data collection with 90 teachers and 16 principals in high-performing schools in Cambodia, Kenya, and Qatar. We further interviewed 11 policymakers.