This study was conducted at SMAN 1 Manokwari, West Papua. The data were collected through classroom observation and interview with two qualified English teachers in the school. The results showed that the English textbooks provided were the main learning source in teaching reading comprehension. The teachers contextually modified the sequence of the tasks and lessons from the textbooks before assigning them to the students in teaching speaking, listening and grammar. Some factors that were considered by the teachers in selecting materials were the availability of learning materials in school, students" needs, and students" level of English competence, school facilities and the national exam. The results of these study consider practical implications to give teachers, practioners, other reserachers and author of textbooks in developing teaching materials to be used in different context of classroom.Keywords: the 2013 curriculum, decision making, textbook use
LITERATURE REVIEWTextbooks are mostly used in English teaching and learning process. Textbook in this study refers to the printed materials that are provided by government to support the implementation of the 2013 curriculum. The English textbooks are designed to develop language competence of students. The textbooks are organized based on the Genre Based Approach. Genre is related to type of text. It is the classification of text based on three characteristics: the communication purpose, organization structure, and language features. The communication purpose or social function is the reasons to speak, write or create a text. Organization structure or generic structure is the way text is organized or arranged. Language features refer to grammar, vocabulary and connectors that are used in text.The government provides book for teachers and books for students. The books for teachers are different from the books for students. The books for teachers give guidelines for teachers to design teaching activities in order to lead