Dewey's concept of enabling children to explore based on their own interests has evolved into investigations and projects using methods of exploration, experimentation, and discovery--three tenets of service-learning. Using mixed methodology, the authors examined the implementation of service-learning in a teacher education program. A total of 155 preservice teachers participated in this study over a 5-year period. Results indicated that preservice teachers believed that their service-learning experiences provided a valuable contribution to the development of pedagogical skills, as well as fostering self-actualization and social-moral development. They also rated the importance of service-learning highly in pedagogical, self-actualization, and social-moral development.