The purpose of the research is to evaluate the practice of reducing class hours in the 2024-2025 academic year in Istanbul, according to the opinions of teachers working at primary, secondary and high school levels and in different branches. The study group was created using the maximum diversity sampling method. The working group consists of teachers working in 2 primary schools, 2 secondary schools and 2 high schools in Sultanbeyli district of Istanbul. 35 people from 11 different branches participated in the study. In this study, which was conducted with the qualitative research method, 'case study', one of the qualitative research designs, was applied. As a data collection tool, a structured interview form consisting of ten questions developed by the researcher was used. In the presentation of the data, the forms were evaluated with the content analysis method, 5 categories were determined according to the interview questions and coding was made. The form created to ensure the internal validity of the research was prepared in accordance with the scientific process, preliminary evaluation was made and approved by experts in the field. To ensure internal reliability, the codes regarding teachers' opinions on reducing class hours were supported by direct quotations. The research method and research process were explained in detail to ensure external reliability and validity. As a result of the research, the majority of teachers stated that the lesson time should continue as 35 minutes.