Abstract: Historically, most of the children, adolescents and adults have always been significantly different in terms of physical and intellectual growth during the human life and had the sorts of disability. Among disabilities, the mental retardation has relatively high frequency in different communities, so that, about 2.5% of people in any society have the mental retardation now. This study identifies the importance of this issue and then investigates the effect of teacher’s cognitive level about the top and normal students on the attitude towards their cognitive growth aspect at high schools of Dushanbe by utilizing the survey method and the researcher-made questionnaire. The statistical population of this study consists of 360 high school teachers in Tajikistan. The random sampling method is done and the number of sample size was estimated equal to 186 samples through Cochran formula. The research results indicate that there is a relationship between the teachers’ social relationship with top and normal students and their attitudes towards the top and normal students’ growth. Furthermore, there is a relationship between the teachers’ cognition of top and normal students and their attitudes towards the top and normal student’s growth.