The purpose of this volume is to expand and refine our understanding of the use of design-based research (DBR) in CALL by contributing to the growing body of literature in this area. We have tried to strike a balance between theoretical considerations and concrete examples of DBR.The first section of this volume focuses on theoretical perspectives and ideas that can inform the use of DBR in CALL. The second section contains studies that illustrate DBR through concrete instances of its operationalization.