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South Korea, Seoul
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SIS is the oldest secular private school in South Korea. The school began in 1973 with founder Edward B. Adams; it received the first Letter of Authorization from the Korean government on June 5, 1973. In 1981 the present eight-acre campus site was selected and the move to the campus occurred in May 1985. The school was first accredited in 1979 by the Western Association of Schools and Colleges (WASC), with subsequent accreditations in 1985, 1991, 1997, 2003, 2009, 2015, and 2021. A seven-story building was completed in 2013 to house the middle and elementary schools, and in 2019 upgrades updated the secondary library, atrium, and network infrastructure.
SIS is guided by TIGERS values as the core principles of its community: Trustworthy Individuals, Independent Learners, Global Citizens, Effective Communicators, Reflective Learners, and Socially Responsible Individuals. The campus is a large, modern facility located just outside Seoul, combining contemporary design with traditional elements. Students participate in athletics and a wide range of extracurricular activities, including clubs that often involve community improvement programs. The school maintains an active alumni network, with alumni events and opportunities to reconnect, such as Alumni Open House events.
Seoul International School (SIS) is a PreK–12 school in Seongnam, Gyeonggi-do, serving international students in the Seoul area. Founded in 1973, SIS provides an American curriculum and offers Advanced Placement (AP) courses in high school. The school’s 2024–2025 High School Profile lists a total PreK–12 enrollment of 802 students. Class sizes are capped at 20 students in Pre-K through Senior Kindergarten, up to 23 students in grades 1–8 and high school classes typically range from 8 to 25 students depending on the course. Students can join activities such as Model United Nations, Science Club, Math Club, Coding club, Student Council and National Honor Societies. SIS also describes a music program that includes ensembles and Suzuki violin beginning in Junior Kindergarten.
