Classrooms have become increasingly diverse places where students from various backgrounds share their learning experiences. To promote inclusive school settings for all, building teacher capacity for inclusive teaching represents a key policy area. Education systems need to ensure that teachers are adequately prepared for inclusive teaching and supported throughout their career. Mechanisms to attract and retain a more diverse teaching body as well as to monitor and evaluate teacher preparation and work with respect to diversity and inclusion should also be developed. While teacher policies have increasingly addressed some of these areas, most education systems lack comprehensive capacity-building frameworks for inclusive teaching. This paper maps policies and practices to build teacher capacity for inclusive teaching across OECD countries. It then presents core elements and competences to design and implement inclusive teaching strategies. Finally, the paper reviews some of the evidence available on teacher diversity and interventions for inclusive teaching.