This document discusses the nature and structure of language as well as the purpose of language teaching in secondary schools. It defines what constitutes a language and identifies the building blocks of language from phonemes to sentences. It also outlines some key properties of human language including that it is creative, structured, meaningful, and referential. The secondary English curriculum aims to develop students' communicative, cognitive, and academic competencies through a communicative, interactive, and collaborative approach to prepare them for global trends.