English as a foreign language (EFL) refers to English language education for non-native English speakers. Imparting EFL training may vary, often subject to the nature of English proficiency of the learner as well as the setting and manner of instruction. In certain cases, it may involve home-based self-directed study, regular classes, or a combination of both. Certain education programs prefer a mixture of English and native language for imparting EFL training, such that grammar, vocabulary, and context may be adapted for comprehension. Besides comprehension, some of the social challenges of EFL education could be high dropout rates, barrier to higher education, difficulty of interaction with native speakers, etc. This book covers in detail some existing theories and innovative concepts revolving around EFL learning and education. Some of the diverse topics covered herein address the varied issues and challenges of EFL learning. The extensive content of this book provides the readers with a thorough understanding of the subject.