Getting insufficient efficiency from the educational system can lead individuals to supplementary tutoring such as private tutoring. Due to the fact that private tutoring is taking more part in our lives day by day and that the COVID-19 pandemic can lead individuals to private tutoring, the purpose of this study is to; longitudinally identify how the COVID-19 period affects private tutoring tendencies of high school students. In order to identify how the COVID-19 pandemic period affected high school students' private tutoring tendencies, data concerning private tutoring tendencies of the students before the COVID-19 period and during the COVID-19 pandemic period were collected for the study. The longitudinal screening model, a quantitative design, was used in the study. The participant group consists of 133 students who took part in the first and second implementation. The "Private Tutoring Tendency Scale" was used in collecting data. According to the study, it was identified that the COVID-19 pandemic period in general increases the private tutoring tendencies of students.