This research purposes to analysis and describe the teacher’s difficulty comprehension about the materials in the teacher’s book and student’s book of Mathematic in Junior High School at VIII grade based on 2013 curriculum. This research uses a descriptive qualitative approach with kind of research is study case. The subjects of research are math teachers at Junior High School consist of oneudteacher in 1 Junior High School Wonogiri, one teacher in 2 Junior High School Wonogiri, and one teacher in 2 Muhammadiyah Junior High School Baturetno. The prime source is from interviewing with the math teachers. Collecting the information by observation, interview, and documentation. The legitimation of data by triangle of source, method, other research, and member check. The model of analysis used by the researcher is interactive analysis. The procedural of this research using three steps, those are study of preparation, general exploration, and special exploration. The result from this research indicates that third of the teacher have same problem into understanding the materials from both of the books are the adequacy of material is yet has a time allocation and the essential of material makes the students being difficulty and also the authenticassessment still to make teachers feel confused.
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