This study contains an understanding of how small schools should implement the school curriculum in order to achieve school socialization as one of the educational goals. Accordingly, it attempted to answer the question by relying on a qualitative case study method. For this purpose, five elementary schools, three middle schools, and one integrated school in Gangwon-do were used as research subjects. Data were collected and analyzed through methods such as review of curriculum documents, school visits and observations, and teacher interviews. The research results are as follows. As a result of analyzing cases by school level, the focus of the three educational elements respectively shifted to teachers, students, and educational content. The direction of curriculum implementation changed in accordance with the context of the teacher's class-student perception in elementary schools, the school culture created through close student relationships in middle schools, and the planning and practice of joint activity programs in integrated elementary and middle schools. And as a result of analyzing cases by regional distribution, considering that the social structure extends to the home, school, and community, the focus of curriculum implementation varies preparing educational care plan, having autonomous teacher and student composition, building a local ecosystem network depending on the distance from the city center. Based on these research results, small schools will be able to faithfully perform the educational function of students' school socialization by establishing a curriculum implementation plan that appropriately considers the structural relationships surrounding students and teachers inside and outside the school.