Teaching English became a professional and academic field from a half century ago. Many researches for teacher education and teacher training have been conducted in order to raise the English as well as the foreign language trainers' knowledge and capabilities in carrying out effective lessons in classroom. During second millennium of speedily globalized world, teaching English as a common communication tool has become even more significant than half century ago. For introducing the history, research methodologies, and teaching pedagogies of teaching English as a Second/Foreign/International Language, this book is composed as a reference for present English teachers under trend of globalization. This book can be a study, which deals with the preparations and professional developments for professional English teachers, which contains diverse ideologies for teaching pedagogies. Based on sufficient theoretical schools of Teaching English, provided by this book, you might be able to find appropriate pedagogies of teaching and methodologies of conducting researches and fieldworks in order to interpret the terminology of English Teaching according to your own personality. At the same time, you will obtain an access to comprehend the other English teachers' particular ways of teaching. Beside identifying the terms and types of Teaching English as a Second Language and as a Foreign Language, this book explains for you what are the general issues in the area of teaching English. The history of teaching English from the Ancient time to the beginning of our third millennium will be described. Traditionally, how English were originally taught and alternatively it was recommended in the present time will be mentioned in this book. After reading this book, you should be able to acquire most of the important familiarities of this academic ground and updated theoretical and empirical discoveries of English Teaching. An index is included. (Individual chapters contain references, figures, tables, and appendixes.)