The research aims to reveal the levels of the teacher\'s role in developing the values of citizenship among students of grades (11-12) in government schools in the Governorate of Dhofar and ways to enhance it from the point of view of its principals. The researcher used the descriptive approach, survey analysis, and questionnaire. The population consisted of 99 male and female managers, and a sample of 89 of them, Based on the SPSS program version V 26 in the analysis. Its most important results were: 1- The levels of the teacher’s role in developing the values of citizenship among students in the four fields of research (loyalty, belonging, duties, rights, and community participation) were generally high according to the arithmetic mean (2.86) out of (3), and the highest was the field of duties values, and the lowest was the area of community participation. 2- The levels of ways to enhance the role of the teacher in promoting values were also high, according to the mean (2.87). 3- There were statistically significant differences between the levels of the teacher’s role in favor of citizens according to the nationality variable. No differences were found according to the variables of gender and age. Its most important recommendations were to increase the effectiveness of training workshops in the field of developing loyalty, belonging and social responsibility for teachers; The educational curricula and its applications include the concept of citizenship more.