A significant role is played by the idea of self-efficacy, which involves students' perceptions of their unique skills and ability to do well in Turkish lectures. The purpose of this study is to create a measurement tool that is both valid and reliable for assessing secondary school students' self-efficacy toward Turkish language instruction. In the 2022–2023 academic year, 420 kids who are enrolled in the fifth, sixth, seventh, and eighth grades at four different public secondary schools in Aksaray city center make up the study group. The package applications AMOS 24.00 and SPSS 22.00 were used to analyze the data. To test the scale's construct validity, factor analysis was done. The exploratory factor analysis produced a 4-factor scale with 23 items as a result. A total of 52.088% of the variance is explained by the scale. The scale's 4-factor structure was verified by confirmatory factor analysis. The fit indices derived by confirmatory factor analysis were found to exhibit satisfactory or outstanding fit. The reliability of the scale's items was evaluated using analyses, and it was found that the scale's Cronbach's Alpha internal consistency coefficient was .89. The research's findings demonstrate that the scale that was created in response to them is a reliable and valid measurement tool for assessing secondary school students' self-efficacy toward Turkish courses. The self-efficacy of fifth, sixth, seventh, and eighth-grade pupils toward Turkish classes can be assessed using this scale.