摘要：In this study, it is aimed to develop a measurement tool that can measure the classroom assessment atmosphere of physical education and sports lesson in a valid and reliable way. Exploratory Sequential Pattern, one of the mixed research approaches, was used in the research. The study was carried out on three different study groups attending in different high schools (Anatolian High School, Science High School and Vocational High School) in Kırıkkale province. A total of 466 students from different high schools in Kırıkkale participated in the study. The criterion sampling technique, one of the purposeful sampling methods, was used in the collection of data. Exploratory Factor Analysis (ECA) was performed with the data obtained from the first study group. The structure revealed by exploratory factor analysis was tested with Confirmatory Factor Analysis. Test-retest reliability analysis was performed with the data obtained from the third study group. As a result of exploratory factor analysis conducted within the framework of construct validity, a structure consisting of 19 items and two factors explaining 38.06% of the total variance was obtained. In order to test item discrimination, item test correlation and 27% sub-upper group comparison were performed. Within the scope of criterion-related validity, there were studies indicating a significant relationship between classroom assessment atmosphere and achievement orientation and burnout status. In this respect, the relationship between PELCAAS, Achievement Orientation Scale and Maslack Burnout Scale was examined. The reliability of the instrument was examined with Cronbach's alpha internal consistency coefficient and test-retest techniques. These test techniques provide evidence that the measuring instrument is highly reliable. Criterion validity analysis was used to provide evidence of validity. According to the current findings, it can be said that Physical Education and Sports Lesson Classroom Assessment Atmosphere Scale is a data collection tool that can make valid and reliable measurements.
