Successful education systems invest in teacher development for their professional growth. Professional teacher development varies from country to country. This chapter describes professional coaching of teachers as one effective approach to early career teacher development in schools. The aim of this chapter is twofold: First, to clarify the conception of coaching and its links to mentoring, and second, to illustrate empirically how schools implement professional coaching as part of their strategies to improve learning and wellbeing of their teachers and students. Conclusion is that when coaching is well defined and strategically implemented as part of overall improvement plan of the school, it can significantly support early career teachers' professional growth, enhance student outcomes, and help schools to retain their teachers.