The aim of this study is to determine the variables affecting the success of students. This research, which was conducted through the relational screening model, has a sampling of students who were selected from a middle city in Turkey. The schools are classified into three as low, medium and high. A total of 3491 students are selected by using the random stratified sampling model. The data were gathered by a survey which included 20 items developed by researchers. In this study, as a result of separate analysis on grade 7 and 8 students, similar conclusions are made. According to the findings of the research, the success of students who received pre-school education is higher than those who did not. Also, students who went to private establishments longer are more successful than the students who went for a short time. Attending extra school courses has similar results as to going to the private school establishments. When shelter conditions are considered, it is found that students who live with their parents are more successful than those students who are boarding or living in dormitories. It is understood that the variables that affect 7th and 8th grade students' success most are "average amount of daily problem solved" and "the time spent in private establishments or school courses".