The purpose of this study is based on various variables (gender and state of taking private tutoring) to determine differentiation in private tutoring tendencies of 12th grade students and their opinions about private tutoring. Mixed method sequential explanatory design was used in this study. The quantitative study group consists of 717 students in 12th grade secondary school studying in different schools types in Istanbul. Quantitative data were collected through stratified sampling method. The qualitative study group consists of 11 students selected according to quantitative data. The maximum variation sampling method was preferred for collecting qualitative data. The "Private Tutoring Tendency Scale" was used for collecting quantitative data; the semi-structured interview form developed by the researchers was used for collecting qualitative data. According to the study results, it was observed that there is significant difference in private tutoring tendency levels of the participants with respect to the gender and private tutoring experience variables. When qualitative findings are considered, it is evident that opinions of the participants are mainly gathered under the themes. These themes are reason for private tutoring tendency, general opinions on private tutoring and methodological opinions on private tutoring. Depending on the findings obtained within the scope of the research, suggestions were made for the legal regulation and the examination of private tutoring from different perspectives.