Research advances in neuroscience and the developmental and learning sciences have provided us with important insights about how people learn and develop. The knowledge we now have points to important transformations in teaching practice, which in turn require transformations in educator development in order to support all educators in developing the knowledge, skills, and dispositions associated with developing the whole child. This report synthesizes research on how to support educators in developing those capacities both in pre-service and in-service contexts. It addresses both the "what" of teacher and leader preparation--the content educators need to learn about children and how to support their development and learning--and the "how"--the strategies for educator learning that can produce deep understanding; useful skills; and the capacity to reflect, learn, and continue to improve. [This report was written in collaboration with Pamela Cantor and David Osher.]