With both high retirement and high attrition rates among K?12 teachers and a burgeoning student population nationwide, more teachers are needed. Yet if we are to turn around schools in need of improvement, help all students meet rigorous academic standards, and close the achievement gap, simply getting more teachers into the profession will not suffice. As reflected in the No Child Left Behind requirement that all teachers of the academic subjects be highly qualified, new teachers must be equipped with the knowledge, skills, and dispositions to teach to high standards and to be effective with the increasingly diverse array of students in today?s classrooms. Moreover, a good number of these newcomers must commit and be able to teach in hard-to-staff content areas and in our most challenging schools. In short, the challenge to the profession is to prepare and retain greater numbers of high-quality teachers. Research methodology and resources are appended.