Theories and principles of course content and materials design in English language teaching (e.g.: selection, adaptation, development and evaluation of content and materials in English language teaching) and the main views for and against the use of English textbooks; the relationship between method, ideology and textbook author; format for the selection of course content and materials: student language proficiency, learnability, ease of use, cultural content, appropriateness of communicative interaction and language use, corpus-based materials deployed in an authentic, real-world context that help students interact with each other and with the teacher; adaptation and development of materials for language teaching, adaptation of textbook materials according to specific learning needs and teaching environments, prospective English teachers to design their own teaching materials and auxiliary materials according to the appropriate method, student level, needs and current school environment; English content and material evaluation, language materials and textbook evaluation criteria for the use of the English textbook in the EFL classroom environment, and current IE methods on content and material design.