The purpose of this study is to determine the extent to which Project TEAM is an effective, socially valid, and feasible intervention that prepares youth with developmental disabilities ages 14-21 to respond to environmental barriers and increases participation in school, work and the community. Project TEAM is a manualized intervention co- facilitated by a disability advocate and a licensed professional. The intervention includes eight group sessions and two experiential learning field trips. In addition, young adults with disabilities serve as peer mentors on field trips and contact youth weekly to support attainment of goals. Project TEAM outcomes are to: increase youths' knowledge of environmental factors and modification strategies; reduce the impact of environmental barriers on participation; increase self-efficacy and self-determination; and increase participation in a personal activity goal in the area of education, employment, or community life. Pilot research showed that Project TEAM participants (N=20) had a significant increase in knowledge of environmental barriers and modification strategies (t(19) = -6.37, p=.00), and 57% increased their participation in one activity.