Book excerpt: In this digital age, faculty, teachers, and teacher educators are increasingly expected to adopt and adapt pedagogical perspectives to support student learning in instructional environments featuring online or blended learning. One highly adopted element of online and blended learning involves the use of online learning discussions. Discussion-based learning offers a rich pedagogical context for creating learning opportunities as well as a great deal of flexibility for a wide variety of learning and learner contexts. As post-secondary and, increasingly, K-12 institutions cope with the rapid growth of online learning, and an increase in the cultural diversity of learners, it is critical to understand, at a detailed level, the relationship between online interaction and learning and how educationally-effective interactions might be nurtured, in an inclusive way, by instructors. The Handbook of Research on Online Discussion-Based Teaching Methods is a cutting-edge research publication that seeks to identify promising designs, pedagogical and assessment strategies, conceptual models, and theoretical frameworks that support discussion-based learning in online and blended learning environments. This book provides a better understanding of the effects and both commonalities and differences of new tools that support interaction, such as video, audio, and real-time interaction in discussion-based learning. Featuring a wide range of topics such as gamification, intercultural learning, and digital agency, this book is ideal for teachers, educational software developers, instructional designers, IT consultants, academicians, curriculum designers, researchers, and students.