This resource was prepared in response to a request from a Race to the Top-Early Learning Challenge (RTT-ELC) State for information about the Transformation Zones that 10 RTT-ELC States had included as key projects in their RTT-ELC plans. This information will be helpful to other States as they consider how to continue to increase the quality of early learning by providing targeted resources to the communities where the children and families with the highest needs live. Geographic areas where States concentrate funding and technical assistance services to support strategic systems-level work have been called achievement zones, community hubs, early childhood hubs, empowerment zones, innovation zones, investment zones, promise communities, and transformation zones. For this discussion, they will be referred to as transformation zones. These zones are well-defined and limited in size. In general, they are areas the size of one or more counties or school districts. This resource includes: (1) a description of transformation zones; (2) information about local implementation teams; (3) a list key issues for States to consider; and (4) lessons learned from States as they have implemented transition zones. The Appendix, State Examples, gives specific State examples about the criteria RTT-ELC States used to select communities and the services States and communities are providing. Early Learning Challenge Technical Assistance (ELC TA) reviewed individual State websites and resource, RTT-ELC Applications, and the 2013 and 2014 RTT-ELC Annual Performance Report data that the RTT-ELC Grantees submitted to the Department of Education and the Department of Health and Human Services in the spring of 2014 and 2015.