This book explores the interfaces of English as a Lingua Franca (ELF) and English as a Foreign Language (EFL) pedagogy. It presents the theoretical aspects of ELF, discusses issues and challenges that ELF raises for the EFL classroom, and demonstrates how EFL practitioners can make use of ELF theorizing for classroom instruction, teacher education, developing language learning materials, policymaking and testing and assessment. Accounts of innovative and practical pedagogical practices and researchers' insights from diverse geographical, cultural and institutional contexts will inform and inspire EFL practitioners to reconsider their practices and adopt new techniques in order to meet their learners' diverse communicative needs in international contexts.