The following profiles address how the state departments of education are helping educators prepare for and implement the Common Core and aligned assessments through professional learning. The major professional development efforts around the Common Core were examined in order to understand the overall efforts of each state. An exhaustive list of all of the professional learning that departments provide was not sought. These profiles provide a descriptive overview of each state's efforts in this area. For trends across the 15 states in their efforts, successes, challenges, types of support states need to move this work forward, and practitioner reflections of their own professional learning and experiences of implementation on the ground.