This research aims to determine the efficacy of the reading intervention program (OKU-GEL) in improving the fluent reading skills of primary school students with dyslexia. The model of the research is the changing criterion design from single-subject research models. The research was carried out with three Turkish-speaking male students attending primary school. The dependent variable of the research is reading speed and reading accuracy, which are fluent reading skills. The independent variable of this research is the OKU-GEL program. OKU-GEL is the abbreviation of the Turkish name of the program. OKU-GEL includes rapid automatic naming, phonological awareness, and repeated reading exercises. The research results showed that; the OKU-GEL program effectively improves the reading speed and reading accuracy skills of students with dyslexia and that students can generalize these skills to different people and environments. The students can maintain these skills two, three, and four weeks after the end of their education. Finally, the results showed that PA, as well as RAN, skills could be improved.