Apuntes Universitarios, cilt.12, sa.3, ss.58-75, 2022 (Hakemli Dergi)
Due to the concept social state, schoolbook have been distributed students free of charge since the 2003-2004 academic year. For this reason, the state has prohibited the use of supplementary textbooks by teachers and students in schools with legislative regulations. In this study, on the basis of secondary school teachers' opinions, the use of supplementary schoolbooks is reviewed. The study is designed with qualitative phenomenology model, and the study group includes 52 secondary school teachers working in the Sivas province. The data has been collected with a survey developed by the researcher and they have been analyzed with the content analysis method. According to the research findings, the majority of the participants think that using supplementary schoolbooks in schools is a necessity, even an obligation. The main reasons of using supplementary schoolbooks are the central exam system and the insufficiency of free books that are given by the state.