This course aims at helping students to become familiar with all kinds of theories in teaching English as a second language. The content includes the theories of Skinner’s, Piaget’s, Vygotsky’s, Krashen’s, Bruner’s, etc. and the theoretical bases and teaching practice of various teaching approaches, such as the Grammar-Translation, the Natural Way, the Direct Methods, the Audiolingual Method, the Suggestopedia/desuggestopedia, the Silent Way, the Total Physical Response (TPR), the Communicative Teaching, the content-base, the task-base (mission-oriented), and so forth.