Teachers make a difference. The success of any plan for improving educational outcomes depends on the teachers who carry it out and thus on the abilities of those attracted to the field and their preparation. Yet there are many questions about how teachers are being prepared and how they ought to be prepared. Yet, teacher preparation is often treated as an afterthought in discussions of improving the public education system. This podcast provides an overview of the teacher preparation landscape and identifies the need for a data collection model to provide valid and reliable information about teacher preparation programs.