Across the country, states are acknowledging the importance of understanding children’s developmental status as they enter kindergarten to ensure an effective response to their instructional needs. Arizona’s KDI partner group is no exception, as they have recognized the importance of the development of a KDI in Arizona. In addition, they understand that the development and implementation of a KDI will be a significant effort within the state. The KDI Stakeholder Taskforce was convened early in the planning process to provide stakeholder input on three key issues: the KDI tool, PD, and communications. This stakeholder input is invaluable as the state moves forward with next steps related to the development of a KDI that will benefit the early childhood community, the K-12 education system, and all children and families across Arizona.