This study investigates the effects of a mindfulness-based program implemented by teachers for their primary school students in the Arab sector of Israel. The study included 958 fourth, fifth, and sixth-grade students, with 659 completing the program and 299 students serving as controls. The effectiveness of the program was assessed through interpersonal and intrapersonal questionnaires, measuring anxiety, perceived stress, mindfulness, tolerance towards an outgroup, and teachers' availability and acceptance. Students completed the questionnaires before and after the program. Significant interactions between time and group were observed in all measured outcomes, indicating the program's positive effects. The findings suggest that mindfulness practices, known to be effective for primary school students in Western societies, can also be effective in collectivist cultures, such as the Arab society in Israel.