In this research, the aim is to determine causes of the failure in a school that was placed second to last as per TEOG average scores despite being located in Burdur city center. This research is in descriptive research model, and a mixed study designed according to both quantitative and qualitative research approach. Study group of the research consists of 11 school teachers and 171 students of the school in question. In the research, quantitative data was collected from students through the causes of failure determination survey, and qualitative data was obtained from teachers through open-ended questions. Quantitative data was examined with descriptive analyses and chi-square test, qualitative data was examined though content analysis. As a result of analyses, it is clearly understood that causes of students’ failure show so much diversity. It has been observed that causes such as inability to ask questions to teachers on issues students do not understand, quickly forgetting what they learn and inability to take good notes show significant difference as per upper and lower success group, and hat students pull such situations to forefront as reasons for failure. As a result of the content analysis, it is understood that teachers explain causes of failure under themes of family, student and school.