This article features schools and school districts with successful induction programs, all easily replicable. Increasingly, research confirms that teacher and teaching quality are the most powerful predictors of student success. In short, principals ensure higher student achievement by assuring better teaching. To do this, effective administrators have a new teacher induction program available for all newly hired teachers, which then seamlessly becomes part of the lifelong, sustained professional development program for the district or school. What keeps a good teacher are structured, sustained, intensive professional development programs that allow new teachers to observe others, to be observed by others, and to be part of networks or study groups where all teachers share together, grow together, and learn to respect each other's work.