The COVID-19 pandemic radically and rapidly, and perhaps forever, changed the K-20 educational landscape. In March 2020, K-12 schools and institutions of higher education were forced to pivot quickly to online and remote teaching. This new paradigm resulted in many teachers, regardless of content area, being unprepared. In the field of second language teaching and learning, world language and TESOL educators require the investigation of techniques used during the global pandemic to ensure continued success in online teaching practice. The Handbook of Research on Effective Online Language Teaching in a Disruptive Environment provides strong and cogent guidance in the use of pedagogically sound methods of online language instruction. This book builds an innovative knowledge base about teaching during disruptive times in the context of K-20 language learning that is supported with empirical evidence. Covering topics such as online work engagement, reflective practice, and flipped classroom methods, this handbook serves as a powerful resource for instructors of English language arts and TESOL, TESOL professionals, pre-service teachers, professors, administrators, instructional designers, curriculum developers, students, researchers, and academicians.