This special issue of the Journal of Jewish Education marks a double milestone: one for the Journal itself, and one for the Mandel Teacher Educator Institute (MTEI), whose graduates are this issue’s authors. For the JJE, this is the first volume entirely devoted to practitioner research. For MTEI, this is the first publication of research done by graduates. I will share a bit about each of these enterprises before I introduce the articles which make up this special issue.