This book provides a decolonial critique of dominant global agendas concerning teacher professionalism and proposes a new understanding based on UNESCO-funded research with teachers based in Colombia, Ethiopia (Tigray), India, Rwanda and Tanzania. Outlining from a teacher's perspective how teacher professionalism may be conceptualized, this book critiques dominant global narratives and conceptions based on deficit discourses. The authors argue that a decolonial lens can help to contextualize the perspectives, experiences and material conditions of teachers in the global South, and the value of such a framework for informing global debates and decision-making in education.