Abstract In 2005, the Children's Bureau (CB) published a funding opportunity announcement (FOA) titled Training of Child Welfare Agency Supervisors in the Effective Delivery and Management of Federal Independent Living Services for Youth in Foster Care. This FOA built on the work of 12 projects funded by the CB in 2000 that focused on the development of training curricula for child welfare practitioners. A key finding from these earlier projects was that in order for supervisors to support the casework efforts of their staff, they need training on youth development to better understand the unique developmental and service needs of youth in out-of-home care. This article summarizes and analyzes findings from the six Supervisor Training demonstration projects funded by CB in 2005. These projects developed, implemented, evaluated, and disseminated training curricula for public child welfare agency supervisors that were designed to strengthen the supervision provided to child welfare staff working with older youth in foster care and/or in independent living programs. The training increased supervisors' ability to provide guidance and oversight to youth workers in several areas, including working with youth to develop and maintain permanent connections. This article shows how these projects bridged the gap between research and practice by using sophisticated training interventions to implement a set of core principles. These principles were identified by the Muskie School of Public Service at the University of Southern Maine and the National Resource Center for Youth Services at the College of Continuing Education, University of Oklahoma, as being associated with successful youth program designs regardless of the types of services provided: 1. Positive youth development; 2. Collaboration; 3. Cultural competency; and 4. Permanent connections. The article summarizes key program interventions, describes their evaluation designs, and presents the projects' process and outcome evaluation results. A summary of key findings analyzes changes in supervisory knowledge and practice, and the transfer of skills and knowledge to independent living workers and the youth with whom they worked. A summary of common challenges, successful strategies, and common lessons learned is presented, along with an annotated bibliography of grantee products that are available to the public. In addition to the projects' final reports, this article is based on published reports from the site visits CB made to the projects in this cluster, and a synthesis of findings from the projects.