There are teachers of STEM subjects and then there are STEM teachers. This chapter distinguishes the two, highlighting preparatory programs and pathways that integrate the best practices illuminated up to this point into the minting of a professional STEM educator. Of all the dimensions of STEM education reform, new teacher production may be the most delicate front for its institutional constraints and market forces. That makes it a most important front as well, where innovators are taking on the challenge. Teacher background information and references are included. This book selection also includes the Table of Contents, About This Book, Acknowledgments, Epilogue, and Index.