The way multiculturalism is reflected in student lesson books affects learners' perspectives on life and other cultures. In Turkey, which hosts people from many cultures, learners need to be aware of multiculturalism.  This study, it is aimed to determine whether different cultural elements are reflected in primary school lesson books, and if so, from which point of view, and to present a detailed analysis and comparison with the series of Oxford Publishing, one of the international publications. The research will examine the activities in 11 English student books used in the 2nd, 3rd and 4th grades of primary education in the 2018-20129 academic year and in 2019 printed "Learn With Us" books of Oxford Publishing. Multiculturalism has been taken as the basis for determining criteria. In this research, the existing situation in terms of books, daily life, living conditions, interpersonal relations, values, beliefs and attitudes, body language, social traditions, ceremonial behaviors, national geography, and standardization elements will be examined from a multicultural perspective. In addition to all these criteria, the books will also be analyzed in terms of reflecting the source culture, target culture, and international culture. Besides, an interview with 10 primary school English teachers has been planned from multiple schools in Turkey that host students from different cultures. Thanks to this interview, the teachers’ perspectives on multiculturalism, as well as the thoughts of the books that are used in the lessons about the multicultural elements and the effects of existing students from different cultures in the classroom environment have been reflected in our study. The research is a qualitative study that is considered analytical research.