This edited collection brings together papers written by a number of experienced international academics who share a passion for promoting research-informed, high-quality pre-service and in-service teacher education that makes a positive difference to the lives of teachers and their students. Taken together, the contributions to this book represent a call to arms for all who lead education policy at local, regional, and national levels, teacher educators, and schools themselves, to engage in sustained and productive collaboration. Topics include: the centrality of empathy to the classroom, ‘practical theorising’ that is a central part of all good teachers’ armoury; the possibilities for collaborative professionalism which enables them to extend and enrich their thinking, commitment, and capacity for resilience; the pedagogical reasoning, habits of mind, critical reflection, knowledge, and skills that lead to the best classroom practices. Only when the voices of stakeholders at all these levels are brought together, heard, and enacted, are students in all schools in all contexts and in all jurisdictions likely to receive the quality of education to which all are entitled. The chapters in this book were originally published as a special issue of Teachers and Teaching.