The texts in the textbooks are one of the basic materials in terms of conveying elements such as achievement, value, and competence in the curriculum. The fact that the texts are suitable for the level of the students helps the students understand and analyze the text better. In this study, it is aimed at determining the readability levels of the texts in the 7th grade textbook and revealing their suitability for the students. In the study, the case design from the qualitative research method was preferred. The materials have been subjected to the subtractive readability process. The obtained data were analyzed by descriptive analysis. At the end of the study, it was determined that the level of the texts was at the level of anxiety; there was a differentiation between the readability scores according to the branches, and there were differences in the readability levels of the texts according to the gender variable. In this context, it is predicted that it will be more beneficial in terms of educational activities to be more careful while selecting or preparing texts for textbooks and to prefer texts according to the level of students.