In the educational circumstances, promoting cultural understanding and tolerance is not an easy task. In addition to top-down policies and promotion, through the practice of school education, teachers must be aware that social justice is not only focused on the proper distribution of social goods. According to Young, the main cause of social injustice lies in "oppression" and"domination." In "Justice and the Politics of Difference," she analyzes five aspects of oppression: exploitation , marginalization, powerlessness, cultural imperialism, and violence. These five aspects, if not lifted from the structure and conscious awareness, no matter how much extra subsidy is given, will not lead to a substantive justice society. The concept of justice requires an in-depth study of social institutions and structures, as well as the personal development and collective communication and cooperation. As teachers in the 21st century, it is necessary to pay attention to the distribution of power in the classroom, not only the material distribution, but also the factors and processes of group decision-making within the class, the division of labor between students and the culture between different ethnic groups. Of course, the structure within the class is difficult to deconstruct. Only by paying attention to students' learning process and development, analyzing the relationship among students in the class, understanding the changes of interaction between students, observing different and multi-level structures, can the oppression of a certain social group be understood. Teachers must also unveil the distributive paradigm by constantly inspiring and constructing a diverse background of students. This article discusses the different aspects of students' oppression from Young's politics of difference. It also reflects on the teachers' emphasis on differences and communication, and tries to construct the image of images: Teachers are thinkers who face the differences among students. Teachers are dialogue communicators who listen to students' diversity, and teachers are mentors who encourage students to achieve themselves.