Every student, no matter where he or she lives, deserves a great teacher. States, educator preparation programs (EPPs), and K–12 leaders must work together to ensure that all teachers are learner ready on day one in the classroom. But too often, these actors do not have access to the necessary information to fully prepare teachers for the unique needs of students in their states. This situation must change, and data is essential to making that happen. This report highlights how states can lead the way by making sure that the right information is available to those who need it and that leaders have the skills to use that information for continuous improvement, not just accountability.