The study focuses on exploring the method of changing pre-service teachers' stereotypes about different ethnicities. The purpose of the study is to test, or try out, an approach for changing beliefs and attitudes of teacher candidates towards peace-building, democracy, humanism, and accepting others. The procedure for this study involved investigating teacher candidates' attitudes or ethnic stereotypes about different nations bordering Ukraine and about themselves as well, conducting attitudes/stereotypes' intervention towards the formation of teachers' peaceful attitudes, and analyzing the consequences of this intervention. The article specifically analyses the research experience for teacher candidates as they reflected on their multi-ethic practices. It also utilizes the research findings to inform the field of teacher education for peace. (Contains 2 tables and 1 figure.)