During the past two decades, several changes have transformed core practices of teacher educators. One of the most salient changes pertains to dramatic shifts in school demographics. In practically every state in the United States, primary, elementary, middle, and high schools are experiencing expanding enrollments of students whose primary language is not English. Recent demographic data show that linguistically and culturally diverse students constitute an increasingly strong presence in our schools and communities. There are approximately 5 million ELs in the U.S., and this number is on...