Book excerpt: The first handbook to explore the field of Teaching English to Speakers of Other Languages in elementary and secondary education (K-12) The number of students being educated in English has grown significantly in modern times — globalization, immigration, and evolving educational policies have prompted an increased need for English language learner (ELL) education. The Handbook of TESOL in K-12 combines contemporary research and current practices to provide a comprehensive overview of the origins, evolution, and future direction of Teaching English to Speakers of Other Languages at the elementary and secondary levels (K-12). Exploring the latest disciplinary and interdisciplinary issues in the field, this is a first-of-its-kind Handbook and contributions are offered from a team of internationally-renowned scholars. Comprehensive in scope, this essential Handbook covers topics ranging from bilingual language development and technology-enhanced language learning, to ESOL preparation methods for specialist and mainstream teachers and school administrators. Three sections organize the content to cover Key Issues in Teaching ESOL students in K-12, Pedagogical Issues and Practices in TESOL in K-12 Education, and School Personnel Preparation for TESOL in K-12. Satisfies a need for inclusive and in-depth research on TESOL in K-12 classrooms Presents a timely and interesting selection of topics that are highly relevant to working teachers and support staff Applies state-of-the-art research to real-world TESOL classroom settings Offers a balanced assessment of diverse theoretical foundations, concepts, and findings The Handbook of TESOL in K-12 is an indispensable resource for undergraduate and graduate students, researchers and scholars, and educators in the field of Teaching English to Speakers of Other Languages in elementary and secondary education.