Practical and accessible, this book comprehensively covers everything you need to know to design, develop, and deliver successful online, blended, and flipped language courses. Grounded in the principles of instructional design and communicative language teaching, it serves as a compendium of best practices, research, and strategies for creating learner-centered online language instruction that builds students' proficiency within meaningful cultural contexts. The book addresses important topics such as finding and optimizing online resources and materials, learner engagement, teacher and student satisfaction and connectedness, professional development, and online language assessment. It features a step-by-step guide aligned with the American Council on the Teaching of Foreign Languages (ACTFL), the Common European Framework of Reference (CEFR) for Languages: Learning, Teaching and Assessment, and the World-Class Instructional Design and Assessment (WIDA) standards; research-based best practices and tools to implement effective communicative language teaching (CLT) online; strategies and practices that apply equally to world languages and ESL/EFL contexts; and key takeaway summaries, discussion questions, and suggestions for further reading in every chapter.