ABSTRACT Public schools in South Korea have faced unprecedented changes because of demographic shifts, particularly the influx and growth of three types of ‘multicultural students’: children of married migrant women, foreign workers, and North Korean refugees. In this situation, teachers are challenged to implement educational policies and a standardised national curriculum for those unfamiliar with the Korean language, culture, and education system. This study, conducted between Fall 2022 and Summer 2023, involved interviews with 16 elementary and secondary school administrators and teachers from urban and rural regions. It revealed that teachers’ perceptions and biases about multicultural students significantly influenced their educational practices, resulting from interpretive processes and problematic framing. The data indicate that teachers’ meaning-making and pedagogical responses to multicultural students are insufficient for systematically addressing the structural inequalities and social injustices faced by these students. Ultimately, these teachers’ responses and practices fell short of providing equitable education that South Korea’s multicultural education policies aim for. The study concluded that comprehensive teacher training in cultural competence and bias awareness is essential for bridging the gap between policy and practice. It recommends the development of reflective practices, continuous professional development, and the creation of supportive school environments to enhance multicultural education’s effectiveness.