Using the Intercultural Competence and Inclusion in Education Scale (ICIES), this study examines variations in intercultural competence and inclusion between mainstream and multiethnic high schools. The sample consisted of 384 high school students, aged 17 to 18, from both rural and urban areas in Western Romania, enrolled in grades 11 and 12. The ICIES demonstrated strong reliability, with a Cronbach’s alpha of 0.721. Exploratory factor analysis revealed three distinct dimensions: Intercultural opportunities and activities, Comfort in diverse settings, and Cultural reflection and values. Independent samples t-tests identified significant differences between mainstream and multiethnic schools across several items, with students in multiethnic schools reporting higher levels of intercultural competence and inclusion. These findings highlight the critical role of multicultural educational settings in fostering students’ cultural awareness and inclusive attitudes. This study provides actionable insights for enhancing multicultural education practices and policies, including teacher training programs, inclusive curricula, and extracurricular initiatives that promote intercultural engagement and reduce intergroup biases.

Acquah, E. O., Szelei, N. (2020). The potential of modelling culturally responsive teaching: pre-service teachers’ learning experiences. Teaching in Higher Education, 25(2), 157–173.

Agirdag, O., Merry, M. S., Van Houtte, M. (2016). Teachers’ understanding of multicultural education and the correlates of multicultural content integration in Flanders. Education and Urban Society, 48(6), 556–582.

Ainscow, M. (2020). Promoting inclusion and equity in education: lessons from international experiences. Nordic journal of studies in educational policy, 6(1), 7–16.

Alam, A., Mohanty, A. (2023). Cultural beliefs and equity in educational institutions: exploring the social and philosophical notions of ability groupings in teaching and learning of mathematics. International Journal of Adolescence and Youth, 28(1), 2270662.

Albulescu, I. (2011). Romanian educational system and multiculturalism. Studia Universitatis Babes-Bolyai-Psychologia-Paedagogia, 56(1), 113–122.

Aldrich, J. O. (2018). Using IBM SPSS statistics: An interactive hands-on approach. Sage Publications.

Anghel, G. A. (2017). School segregation vs. desegregation in Romania. Case study. Revista Românească pentru Educaţie Multidimensională, 9(1), 95–105.

Arneback, E., Jämte, J. (2022). How to counteract racism in education–A typology of teachers’ anti-racist actions. Race ethnicity and education, 25(2), 192–211.

Assefa, E. A., Zenebe, C. K. (2024). Fostering inclusive excellence: Strategies for effective diversity management in schools. International Journal of Research in Education Humanities and Commerce, 5(2), 189–211.

Bagci, S. C., Kumashiro, M., Smith, P. K., et al. (2014). Cross-ethnic friendships: Are they really rare? Evidence from secondary schools around London. International Journal of Intercultural Relations, 41, 125–137.

Bellmore, A., Nishina, A., You, J. I., Ma, T. L. (2012). School context protective factors against peer ethnic discrimination across the high school years. American journal of community psychology, 49(1–2), 98–111.

Bryan, A. (2010). Corporate multiculturalism, diversity management, and positive interculturalism in Irish schools and society. Irish Educational Studies, 29(3), 253–269.

Celeste, L., Baysu, G., Phalet, K., et al. (2019). Can school diversity policies reduce belonging and achievement gaps between minority and majority youth? Multiculturalism, colorblindness, and assimilationism assessed. Personality and Social Psychology Bulletin, 45(11), 1603–1618.

Chang, J., Le, T. N. (2010). Multiculturalism as a dimension of school climate: The impact on the academic achievement of Asian American and Hispanic youth. Cultural Diversity and Ethnic Minority Psychology, 16(4), 485.

Cho, G., Hwang, H., Sarstedt, M., Ringle, C. M. (2020). Cutoff criteria for overall model fit indexes in generalized structured component analysis. Journal of marketing analytics, 8(4), 189–202.

Civitillo, S., Schachner, M., Juang, L., et al. (2017). Towards a better understanding of cultural diversity approaches at school: A multi-informant and mixed-methods study. Learning, Culture and Social Interaction, 12, 1–14.

Colombo, M., Santagati, M. (2017). School integration as a sociological construct: measuring multiethnic classrooms’ integration in Italy. In: Living in Two Homes. Emerald Publishing. pp. 253–292.

Cowie, H., Smith, P., Boulton, M., Laver, R. (2018). Cooperation in the Multi-Ethnic Classroom (1994): The Impact of Cooperative Group Work on Social Relationships in Middle Schools. Routledge Publishing.

Dabu, I. S. (2019). Values and Attitudes in Banat Multiethnic Communities. European Review of Applied Sociology, 12(18), 6–12.

De Leersnyder, J., Gündemir, S., Ağirdağ, O. (2022). Diversity approaches matter in international classrooms: How a multicultural approach buffers against cultural misunderstandings and encourages inclusion and psychological safety. Studies in Higher Education, 47(9), 1903–1920.

Diem, S., Good, M., Smotherson, B., et al. (2022). Language and power dynamics: A critical policy analysis of racial and choice discourses in school integration policies. Education Policy Analysis Archives, 30, 12–12.

Faas, D. (2016). Negotiating political identities: Multiethnic schools and youth in Europe. Routledge Publishing.

Fabrigar, L. R., Wegener, D. T. (2011). Exploratory factor analysis. Oxford University Press.

Foster, P. (2019). Policy and practice in multicultural and anti-racist education: A case study of a multi-ethnic comprehensive school. Routledge Publishing.

Georgiades, K., Boyle, M. H., Fife, K. A. (2013). Emotional and behavioral problems among adolescent students: The role of immigrant, racial/ethnic congruence and belongingness in schools. Journal of youth and adolescence, 42, 1473–1492.

Graham, S. (2018). Race/ethnicity and social adjustment of adolescents: How (not if) school diversity matters. Educational Psychologist, 53(2), 64–77.

Grant, C. A., Sleeter, C. E. (2012). Doing multicultural education for achievement and equity. Routledge Publishing.

Guberina, T. (2023). Cultivating inclusive learning environments: Incorporating diversity through culturally responsive pedagogy. Social Science Chronicle, 2, 1–14.

Hammer, M. R. (2012). The Intercultural Development Inventory: A new frontier in assessment and development of intercultural competence. In: Student learning abroad. Routledge Publishing. pp. 115–136.

Jackson, R. (2018). Studying religious diversity in public education: An interpretive approach to religious and intercultural understanding. In: Religious Education for Plural Societies. Routledge Publishing. pp. 86–102.

Knifsend, C. A., Juvonen, J. (2017). Extracurricular activities in multiethnic middle schools: Ideal context for positive intergroup attitudes? Journal of Research on Adolescence, 27(2), 407–422.

Kurian, N. (2024). Building inclusive, multicultural early years classrooms: Strategies for a culturally responsive ethic of care. Early Childhood Education Journal, 52(5), 863–878.

Lorenzo‐Blanco, E. I., Bares, C. B., Delva, J. (2013). Parenting, family processes, relationships, and parental support in multiracial and multiethnic families: An exploratory study of youth perceptions. Family relations, 62(1), 125–139.

Manea, A. D., Stan, C. (2011). Education and inter-culturalism within Romanian social field. Educatia 21, 9, 1-12.

Maran, M., Cinc, E. (2011). Education in the Romanian language in the context of multiculturalism and multilingualism in Vojvodina-The past, the present and the future. International Journal of Arts & Sciences, 4(18), 325.

Marici, M., Rad, D., Runcan, P., et al. (2024). Investigating the indirect effects of appearance-related anxiety on Instagram addiction: A sequential mediation analysis. Journal of Infrastructure, Policy and Development, 8(14).

Meetoo, V. (2020). Negotiating the diversity of ‘everyday’multiculturalism: Teachers’ enactments in an inner city secondary school. Race Ethnicity and Education, 23(2), 261–279.

Mickelson, R. A., Nkomo, M. (2012). Integrated schooling, life course outcomes, and social cohesion in multiethnic democratic societies. Review of Research in Education, 36(1), 197–238.

Murrell Jr, P. C. (2017). Race, culture, and schooling: Identities of achievement in multicultural urban schools. Routledge Publishing.

Nishina, A., Witkow, M. R. (2020). Why developmental researchers should care about biracial, multiracial, and multiethnic youth. Child Development Perspectives, 14(1), 21–27.

Nishina, A., Lewis, J. A., Bellmore, A., Witkow, M. R. (2019). Ethnic diversity and inclusive school environments. Educational Psychologist, 54(4), 306–321.

Okoye-Johnson, O. (2011). Does multicultural education improve students’ racial attitudes? Implications for closing the achievement gap. Journal of Black Studies, 42(8), 1252–1274.

Paris, D. (2011). ‘A friend who understand fully’: Notes on humanizing research in a multiethnic youth community. International Journal of Qualitative Studies in Education, 24(2), 137–149.

Pica-Smith, C. (2011). Children’s perceptions of interethnic and interracial friendships in a multiethnic school context. Journal of Research in Childhood Education, 25(2), 119–132.

Pica-Smith, C., Contini, R. M., Veloria, C. N. (2018). Social justice education in European multi-ethnic schools: Addressing the goals of intercultural education. Routledge Publishing.

Richardson, R. (2021). Racial segregation and the data-driven society: How our failure to reckon with root causes perpetuates separate and unequal realities. Berkeley Tech. LJ, 36, 1051.

Santagati, M. (2015). Researching integration in multiethnic Italian schools. A sociological review on educational inequalities. Italian Journal of Sociology of Education, 7(3), 294–334.

Schachner, M. K. (2019). From equality and inclusion to cultural pluralism–Evolution and effects of cultural diversity perspectives in schools. European Journal of Developmental Psychology, 16(1), 1–17.

Schachner, M. K., Noack, P. (2016). Adolescent perceptions of school and interethnic relations: A 3-year longitudinal study on the role of ethnic school diversity in German secondary schools. Journal of Youth and Adolescence, 45(8), 1623–1638.

Schachner, M. K., Brenick, A., Noack, P., et al. (2015). Structural and normative conditions for interethnic friendships in multiethnic classrooms. International Journal of Intercultural Relations, 47, 1–12.

Schachner, M. K., Schwarzenthal, M., Noack, P. (2021). Individuals, groups, and classrooms: Conceptual and methodological considerations on studying approaches to cultural diversity in schools. Methods and assessment in culture and psychology, 123–143.

Schachner, M. K., Schwarzenthal, M., Van De Vijver, F. J., Noack, P. (2019). How all students can belong and achieve: Effects of the cultural diversity climate amongst students of immigrant and nonimmigrant background in Germany. Journal of Educational Psychology, 111(4), 703.

Schwarzenthal, M., Schachner, M. K., van de Vijver, F. J., Juang, L. P. (2018). Equal but different: Effects of equality/inclusion and cultural pluralism on intergroup outcomes in multiethnic classrooms. Cultural Diversity and Ethnic Minority Psychology, 24(2), 260.

Stroub, K. J., Richards, M. P. (2013). From resegregation to reintegration: Trends in the racial/ethnic segregation of metropolitan public schools, 1993–2009. American Educational Research Journal, 50(3), 497–531.

Tatum, B. D. (2017). Why are all the Black kids sitting together in the cafeteria? And other conversations about race. Basic Books.

Törngren, S. O., Irastorza, N., Rodríguez-García, D. (2021). Understanding multiethnic and multiracial experiences globally: Towards a conceptual framework of mixedness. Journal of Ethnic and Migration Studies, 47(4), 763–781.

Truong, M., Paradies, Y., Priest, N. (2014). Interventions to improve cultural competency in healthcare: a systematic review of reviews. BMC health services research, 14, 1–17.

Uddin, M. E. (2023). Minority parents’ social status and children’s psychosocial problems in multi-ethnic school context linking with primary school outcomes in Bangladesh. Current Psychology, 42(22), 19241–19252.

Van der Zee, K., Van Oudenhoven, J. P., Ponterotto, J. G., Fietzer, A. W. (2013). Multicultural Personality Questionnaire: Development of a short form. Journal of personality assessment, 95(1), 118–124.

Vaske, J. J., Beaman, J., Sponarski, C. C. (2017). Rethinking internal consistency in Cronbach’s alpha. Leisure sciences, 39(2), 163–173.

Vervoort, M. H., Scholte, R. H., Scheepers, P. L. (2011). Ethnic composition of school classes, majority–minority friendships, and adolescents’ intergroup attitudes in the Netherlands. Journal of adolescence, 34(2), 257–267.

Windle, J. (2023). School segregation in Rio de Janeiro: geographical, racial and historical dimensions of a centre-periphery dynamic. In Comparative Perspectives on School Segregation. Routledge Publishing. pp. 91–105.

Zirkel, S. (2008). Creating more effective multiethnic schools. Social issues and policy review, 2(1), 187–241.