There is scant literature about identifying factors contributing to the success of the implementation of programs to help understand the interrelationships among multiple facets of implementation. In this paper, a front-line implementer reviewed the execution practice of Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes) in her former school in terms of program, people, process, policy and place (5Ps). By examining the factors contributing to the success of the implementation, the authors intend to fi ll the gap between the research and the practical school-based front-line implementation. Although the program implementation process was examined in researchers ' " expert " perspective, it would be helpful if more research employed front-line workers as collaborators and participants in the implementation process to understand what actually happen in the program implementation process.