Book excerpt: With the increased necessity of using online teaching to ensure students continue to learn, it is imperative that language teachers implement computer-assisted language learning (CALL) techniques into their teaching strategies. TESOL teachers especially must continue to remain up to date on the latest research outlining best practices for the online teaching of English language learners. CALL Theory Applications for Online TESOL Education is a crucial reference work that focuses on online education and CALL in the context of teaching English to speakers of other languages. The book presents research that illustrates the current best practices in online CALL applications in TESOL including works on emerging applications such as mobile language learning, games, and service-learning. It includes chapters that focus on technology-enhanced learning in a variety of configurations, from fully online contexts to face-to-face blended learning contexts that have some degree of a virtual component. While highlighting topics that include e-learning, second language acquisition, and virtual learning environments, this book is ideal for TESOL educators and CALL practitioners who are interested in the ways in which language and culture are impacted by online education. Moreover, K-12 teachers and teacher educators working with linguistically and culturally diverse learners in their classes and communities, as well as administrators, academicians, researchers, and students will benefit from the research contained in this book.