The New England Head Start Teaching Center (NEHSTC) is one of 14 federally funded programs created to test the efficacy of participatory, hands-on training for enhancing Head Start service delivery. An outcome evaluation of the program was conducted after 3 years of operation. The research design of the evaluation was a nonequivalent comparison group design with information collected prior to training, and 1 and 6 months after training. Comparison subjects were drawn from Head Start agencies in the New England region who had not participated in NEHSTC training. Data were collected through surveys and on-site observations of randomly selected trainees 6 months after training. A total of 239 trainees comprised the NEHSTC group and 130 the comparison group. Training was provided to Head Start staff in groups of up to 12 persons during a 3- to 5-day period of residence at the Teaching Center and included areas such as cultural diversity, individualizing services, home visiting, food safety, director development, and child-initiated activities. Four types of learning activities were used: didactic, group discussion, simulation/role play, and participatory. The findings demonstrated that the NEHSTC was successful in implementing high quality, participatory training within the context of an on-going Head Start program. The outcome findings indicated that staff who participated in the NEHSTC training demonstrated gains in knowledge, skills, and attitudes compared to similar Head Start employees who did not receive such training. The positive findings suggest that participatory training should be included in the menu of training options available to Head Start. (Author/KB)