The document discusses various language teaching methodologies and techniques. It begins by defining key concepts like methodology, approach, method, curriculum/syllabus and technique. It then examines principles of language learning from cognitive, affective and linguistic perspectives. Various teaching methods are outlined, including their objectives, key features and typical techniques. These include the Grammar-Translation Method, Direct Method, Audio-Lingual Method, Communicative Language Teaching and others. Considerations for teaching different age groups like young learners, teenagers and adults are also discussed.