This book presents a model of transformative, empowering and critically oriented language teacher education to prepare English teachers to implement Global Englishes Language Teaching (GELT).GELT's importance to learners' needs for communication in the globalized world means that it receives tremendous interest from language teacher educators worldwide, underlining the risks posed by gaps in teachers' knowledge of how to implement it. This book fills in those gaps, with accessible theoretical foundations and practical examples drawn from the successful work of the M.Ed. in Teaching English as a Global Language (TEGL) at Burapha University, Thailand. Through critically oriented frameworks, the TEGL program equips in-service English teachers with a critical lens to examine their current practices, challenge the sociocultural and educational backgrounds that teachers bring into teacher education, and empower them in transforming their classroom practices to correspond with the GELT paradigm. The book highlights how the global spread of English impacts language teacher education, discusses the theoretical foundations underlying the design of teacher education for GELT, addresses the knowledge base for preparing teachers to use GELT and examines the applications of teacher education for GELT. It is vital reading for graduate students, teacher educators, and researchers in language teacher education and beyond.