This article describes a successful model used in international service-learning projects that integrates economic development and ecological improvement. The principles of the model are discussed, including commitments to maintain partnerships over time, emphasize the transfer of knowledge from one generation of students to the next, start small, build a history of success, and gain community trust. The application of this model to an evolving series of service-learning projects in Honduras is discussed. The article concludes with a discussion of some of the challenges and management strategies useful in implementing the model.