This opening chapter provides an introduction to and rationale for Teachers and Teaching Post-COVID. It explores persistent challenges around teacher recruitment, well-being and retention, before summarising some of the impacts that the pandemic has had upon teachers and teaching. It provides a rationale for the three organising sections of this book: Priorities, Alliances and Re-Imaginings, and introduces the chapters featured in each of these sections. Together these provide rich records of teachers’ experiences from diverse educational phases and locations that illuminate how the complexity of teaching work is entangled in the emotional, relational and embodied nature of teachers’ everyday lives.