In 2017, the National Technical Assistance Center for the Education of Neglected or Delinquent Children and Youth (NDTAC) released its first in a series of professional development briefs that focus on the professional development needs and interests of Neglected or Delinquent (N or D) State coordinators, correctional educators, and providers of Title I, Part D (Part D) programs and services. This second professional development brief seeks to increase practitioners' knowledge about effective transition planning for youth moving into, through, and out of the juvenile justice system, as well as to present ideas for professional development offerings that focus on the topic of transition. The brief also presents insights that emerged during conversations with N or D State Coordinators and Part D subgrantees and examples of effective approaches to transition planning and implementation across the various stages and components that play a role in providing high-quality transition services. [For the first issue brief (Jan 2017), see ED577000.]