The document discusses key concepts in language curriculum development including approaches, methods, techniques, syllabus and curriculum. It defines an approach as a set of assumptions about language teaching and learning. A method is an overall plan for presenting language based on an approach. Techniques are specific classroom activities. A syllabus specifies the content to be learned for a subject, while a curriculum provides the overall goals and rationale for a program. It also discusses different types of syllabuses including structural, situational and notional syllabuses.