This study is about the appropriateness of the content of student English book for the first semester of grade X of Senior High School published by Ministry of Education and Culture based on thecontent standard of curriculum 2013 that has been specified by The Agency of National Standard of Education (BSNP). The background of the research was based on the policy of government for ordering some schools to revert 2013 curriculum to the 2006 curriculum and continue it in other schools after applying 2013 curriculum since 2013. It will be applied again after reviewing by the government. That policy makes a big question is the textbook as the primary sources for student appropriate with 2013 curriculum or not.
The objectives of this study was to identify the content appropriateness of Student English Book of 2013 curriculum for the first semester grade X of Senior High School published by Ministry of Education and Culture based on content standard of 2013 Curriculum.
This study used qualitative approach, which analyzed the materials of the book or content analysis. The source of data analysis in this study was Student English Book for the First Semester of Grade X of Senior High School Published by Ministry of Education and Culture. To collect the data, the researcher used documentation.
The result of this study can be stated that the content of the Student English Book for the First Semester of Grade X of Senior High School Published by Ministry of Education and Culture is appropriate with content standard of 2013 curriculum. It is based on the data as follows: the compatibility of material items with core competence and basic competence is 84 % or in a good category. The accuracy of material is 86 % or in a very good category. Learning supporting sources is 84 % or in a good category.