In order to provide guidance for agencies in developing effective programs for pregnant and parenting teens, this article analyzes data from 21 federally funded care programs involved in a national evaluation. First, the question of a program's location and structure was addressed. Rural projects were found to be less service-rich than their urban counterparts and non-hospital programs of several varieties all delivered more services of most types and more total services than did hospital projects. It was concluded that the key to a good program lies more in competent management and good community relations than in specific structures or models. Second, with regard to client characteristics, girls who entered the programs pregnant were found to receive more services than those coming in as entry mothers, and girls on welfare received more services than those who were not. Third, an examination of service costs revealed that even more important than the absolute cost of different client types was the contrast between clients' entitlements and what they get "extra" in these programs. Fourth, an examination of project implementation and management uncovered the need for adequate lead time to develop interagency coordination; the need for adequate case management, client record keeping and tracking; and the need for greater emphasis on services to parenting teens. Finally, programs are urged to take seriously the needs not only of pregnant teens but also of teen parents and school dropouts. (RDN)