The aim of this study is to develop a valid and reliable scale that can be used in investigating learning process of secondary school students. The study was carried out with students attending to different secondary schools in Mardin in 2018. Survey method was employed, and sampling was chosen with the help of simple random sampling method in this study. In order to create an item pool, 26 students having education in the 10th grade were asked to write an essay about the concept and process of learning how to learn. Then the literature was searched, and a 5-point likert-type 66-item draft scale was formed out of the data obtained from this essay. The draft scale was revised in accordance with the expert views. The data achieved after the application of the scale were analysed using SPSS and AMOS programs. In the analysis, item total correlation, exploratory and confirmatory factor analysis and reliability analysis techniques were benefited. According to analyses performed, it was seen that the scale was of 21 items and had a structure of 5 factors, and the variant ratio that it explained was 52.630% and that also fit index values were acceptable, and they were at an excellent harmony level. It was observed that there was a positive direction and medium level relation Among all factors. Cronbach alpha internal consistency reliability coefficient of the scale changes between 0.655 and 0.864. As a result, it is comprehended that Learning How to Learn Scale prepared as 5 Likert type can be employed as a valid and reliable measuring tool for students attending secondary school according to findings obtained.