Özet:

The aim of this study is to reveal the students and teachers' opinions about the math-oriented epistemological beliefs of high school students of 9th and 10th classes. In the research methods of quality research has been used the situation study design. The study’s work group consists of 28 students studying in the secondary education institutions located in the center of Sivas and 41 teachers of mathematics working in these schools. The study group consisting of students is determined by the easy-to-accessful case sampling methods, the maximum diversity sampling method is used when determining the work group consisting of teachers. As a data collection tool in the research; two separate semi-configured forms of conversation are prepared parallel to each other for teachers and students. In the analysis of the data obtained, the content analysis method was used using the QSR NVIVO 10 program. As a result, three main themes of math-focused epistemological belief were created. These topics are the state of believing that students learn math lessons is dependent on the effort and the reasons for this belief, the state of believing that students learn math lessons is dependent on the ability and the reasons for this belief, the state of believing that students learn math lessons exists a single truth and the reasons for this belief. In general, students and teachers’ opinions reveal that students believe that learning math is dependent on the effort and that they believe that one truth exists, and that they believe that it is dependent on the ability. Students and teachers are similar in general.