This book recognizes the associated opportunities and challenges for teachers, and provides the rationale, strategies and tools to design blended learning courses or to guide the transition from fully face-to-face or fully online courses to blended instruction. The authors propose a framework based on four phases, Design, Build, Teach and Evaluate, which facilitates a systematic approach to course development. The volume simplifies the connection between theory and practice, by including examples that readers can relate to and immediately implement as they build or teach a course. Including case studies of successful implementations, and effective instructional strategies and techniques, this book is accessible even for teachers without previous experience in course design, whilst also acting as a reference for more experienced language educators.