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This paper aims to explain the underground curriculum in the field of ethnicity and provide its practical evidence from the Iranian schools. This paper follows a qualitative research method According to the results of this research, when ethnic groups do not have a proper position in formal curricula, and in many cases, there is a cultural humiliation of subcultures, in other words, when cultural occupation takes place in schools, in such circumstances, Ethnicity is considered as one of the main areas for the formation of underground curricula. Also, based on the data analysis, seven main themes related to this research are: Preference for mother tongue on formal language, ethnicity bias of teachers and students, opposition to the content of formal curriculum, the use of ethnic symbols in schools, the spread of ethnic music and their symbols in schools, humiliation Other ethnic groups and expansion of separatist ideas.

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The purpose of this study was to investigate the position of ethnicity in formal and hidden curricula of the new secondary education system in the 98-97 academic year. The research method in the first part of the research included documentary analysis and qualitative content analysis. Sampling in this section was targeted and included 6 volumes of books in the form of more than 960 pages of history & sociology books in the second secondary school.The content analysis unit in this section was text, images, and textbook activities. In the second part of the research, the research method was qualitative and ethnographic and various tools such as student journals and informal interviews were used in collecting research data. Finally, based on the findings of this study, it can be acknowledged that the position of ethnicity in the formal and hidden curricula of the secondary school was undesirable.

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The purpose of this study was to investigate the status of ethnicity and lived ethnic experiences of junior school students in the formal-hidden curriculum of Iran's academic year in 2019-2020.The research method in the first part of documentary analysis and qualitative content analysis with 3 volumes of social studies book including 553 pages.Content Analysis Unit;Text-Images and activities.The second part of the qualitative and phenomenological research method was purposeful sampling of participants including 30 students (persian-Azeri-Kurd-Lor-gilak) and 20 teachers.Student journal and informal interview were also used. Findings show that only 6% of the three sections of the examined content pay attention to the desirable components of ethnicity, which is very undesirable in the formal curriculum.In the analysis of information,cultural assimilation, superficial thoughts about ethnic culture, educational inequality, cultural diversity alienism,neglect of peaceful coexistence appeared, overall, it can be acknowledged that the position of ethnicity in the hidden curriculum was not desirable