The document provides a comprehensive historical overview of materials development in English Language Teaching (ELT), categorizing different methods and approaches such as the Grammar Translation Method, Direct Method, Audiolingual Method, and more. It discusses the evolution, phases, and turning points that have influenced materials development, as well as the types of materials utilized in these approaches. The document emphasizes the importance of both printed and non-printed materials, highlighting the professionality of the field and current trends.