This paper discusses the profession of teaching English as a second language. The problems encountered in classes taught by untrained amateurs are discussed, and the strategies of the professional teacher are outlined. She or he begins by finding out who the students are, what they need to know, and how they will have to use English. In this way, contexts that have meaning for the student can be provided. The language is to be taught as it is used in society and not in an artificial manner. Specific ways of getting at real language usage are described. The need for order in teaching is stressed, as opposed to a "bits and pieces" approach. Teaching language also involves the teaching of culture. This entails an awareness of the students' cultural background in order not to force some aspects of American culture on them too quickly. The professional language teacher should also be capable of effectively evaluating textbooks and teaching materials. (CLK)