Abstract

• The main purpose of this study was to establish the validity and reliability of the Teaching Aptitude Scale (TAS). Descriptive research design and quantitative survey method were used in this study. A total of 501 student teachers (fourth year, second semester) selected from three Universities of Education participated in this study. The required sample was selected by using simple random sampling technique. In the section of data analysis, exploratory factor analysis, confirmatory factor analysis, computing the values of composite reliability and Average Variance Extracted were used. According to the result, construct validity of Teaching Aptitude Scale (TAS) was satisfactory. All the values of fitness indexes for the final model have reached the level of acceptance. Six subscales found are Dynamic Personality, Optimistic Attitude, Attitude towards Teaching Profession, Interest in Teaching, Moral Character and Discipline, Co-operative Attitude. The validated scale consists of 38 items. Convergent validity, discriminant validity of the scale was also satisfactory. Reliability coefficient of the scale was .935. Therefore, the scale may contribute to i