ABSTRACT
This chapter examines the use of materials in English for specific purposes (ESP) course design, with reference to ESP course books, and covers a range of issues within the topic. It covers the following areas in ESP materials: what are ESP materials? authentic materials, adapting authentic materials, ESP practitioner and materials and ESP course books. According to B. Tomlinson, materials refer to "anything used by teachers or learners to facilitate the learning of a language". Tomlinson refers to the principles of second-language acquisition in relation to materials. The most important aspect of ESP materials is that they reflect the target communicative situation. ESP courses usually include authentic materials: that is, texts that are not designed for language-learning purposes but for experts in the ESP field. The notion of authentic materials in ESP is not straightforward. Adapting authentic materials should be done in a systematic way.
