This study was conducted in order to reveal the level of instructional leadership behavior scores of school administrators working in public secondary schools according to the opinions of teachers and to examine them in terms of various variables. The working group of this research, which was designed in the converging parallel pattern of the mixed method, was formed through easily accessible sampling. 383 teachers in the central districts of Mersin province formed the quantitative data study group and 5 teachers formed the qualitative data study group. The semistructured interview form prepared by the researcher and the "Instructional Leadership Scale" developed by Alig-Meilcarek (2003) and adapted to Turkish by Sahin (2011) were used as data collection tools. Kolmogorov Smirnov test was applied for normality test. Kolmogorov Smirnov value is <0.05. Skewness value is between -+ 3 values and the kurtosis value is between +-10 values. Kline (2011) mentioned that normality tests can be performed if the normal distribution has a skewness value of ± 3 and a kurtosis value of ± 10. Since the quantitative data showed a normal distribution, they were analyzed by independent T-test analysis, while the qualitative data were analyzed with the help of content analysis. When the research findings were evaluated, it was found that there was no significant difference between the school administrators' instructional leadership scores according to the gender of the participants.