The chapters of this volume focus on a broad range of topics that address a variety of research issues on service-learning in K-12 education, teacher education, and higher education. Through a wide-scoped research lens, the volume explores definitional foundations of service-learning, theoretical issues regarding service-learning, the impacts of service-learning, and methodological approaches to studying service-learning. Collectively, the chapters of the book provide varying and, at times, opposing perspectives on some of the critical issues regarding service-learning research and practice.