Korea International School, Jeju Campus

The elementary school promotes experiential learning. As a Writing and Reading Workshop school, students learn by doing. Methods for writing and reading instruction were developed from the early work of Donald Graves, Donald Murray, and other teacher-researchers who found that coaching students to write and read for a variety of purposes is the most effective way to teach skills and concepts. The elementary school uses a standards-based approach to education, where progress in students' learning is communicated through levels (1-4) and on report cards.

Like the elementary school, the middle school uses the Readers and Writers Workshop approach to teach essential reading and writing skills. The middle school also uses a standards-based approach to assessment and reporting.

KISJ High School students take a typical college-preparatory class load with a modified-block schedule of 4 classes per day, and can challenge themselves through Honors and Advanced Placement® courses, as well as visual and performing arts. Curricular offerings include Honors classes in Grades 9 and 10 with AP courses offered beginning in Grade 10.

Students can be considered for the following Honors courses: Algebra, Geometry, Band, Choir, English 9, English 10, Journalism, Orchestra, Theatre, and Yearbook. Entrance into Honors courses requires a teacher recommendation and considers historical subject grades, standardized test scores (e.g. MAP, AMC, STAR Reading), and additional documentation as needed.

AP classes allow students to engage in a demanding curriculum equivalent to an entry-level college/university course. Currently there are 18 AP® courses offered, including English Language and Composition, English Literature and Composition, United States History, World History, Psychology, Chinese Language and Culture, Studio Art: 2-D Design, Biology, Chemistry, Environmental Science, Calculus AB and BC, Macroeconomics, Physics 1 and 2, Statistics, Seminar, and Research. Students can take a maximum of 6 AP classes if they have below a 3.8 GPA or 8 AP classes if they have above a 3.8 GPA.

Advanced Placement courses are offered starting in Grade 10. 2017 marks the charter year for the AP Capstone™ program, with the introduction of AP Seminar for select members of the Grade-11 class. The second Capstone course, AP Research, was added in 2018. AP Capstone is a College Board program designed to equip students with the independent research, collaborative teamwork, and communication skills that are increasingly valued by colleges. It cultivates curious, independent, and collaborative scholars and prepares them to make logical, evidence-based decisions. Students who pass exams for both of these Capstone courses in addition to four other AP courses will achieve the AP Capstone Diploma™.

Participation in AP coursework is a selective process, wherein students who have a minimum weighted GPA of 3.33 need to complete an application to individual AP courses. To ensure academic readiness and success, additional requirements may be made by individual AP teachers, which include teacher recommendations, advanced reading competency, and completion of required AP summer assignments.[13]

KISJ uses letter grades to summarize the assessment of student benchmark performance. A 4-point grade point scale is used to share the overall academic achievement of each student with colleges and universities. All credit classes are included in the grade point average (GPA). Classes that are designated as Honors (H) or Advanced Placement (AP) receive an additional weighting of (.500) points. The academic year is divided into two semesters, with report cards being issued at the end of each semester (Semester 1 and Semester 2).[13]

To graduate, high school students need 5.5 English credits, 3 mathematics credits (4 recommended), 3 science credits (4 recommended), 3 social studies credits (4 recommended), 2 world language credits, 2 physical education credits, 1 multimedia/technology credit, .5 speech/debate credits, and 1 visual/performing arts credit. 5 additional elective credits must also be earned beyond these. Korean passport holders are also required to take 1.5 credits of Korean language and history. In total, a minimum of 25.5 credits is required.

Additionally, all students are required to complete a cumulative total of 40 hours of service as a requirement for graduation. Students are responsible for keeping track of their service hours and submitting the required documentation. Most students earn their service hours through club activities, service Learning trips, tutoring other students, and dorm volunteering opportunities.

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Sports are divided into three seasons:

KISJ is a member of the following conferences: Korea International School Activities Conference (KISAC), Korean American Interscholastic Activities Conference (KAIAC), Jeju Activities Conference (JAC). In the 2017 school year, KISJ hosted its first ever international Volleyball Invitational tournament. In 2018–19, the Boys Soccer team traveled to the American School in Japan to play in the Kanto Plain Classics as a guest team from South Korea, while the Girls Soccer team also traveled to the American School in Japan to play in the spring. The swim team annually travels to Taiwan for swim competitions, and the Boys and Girls Volleyball team, Boys and Girls Basketball team, and Boys and Girls Soccer team are part of the six-school, AISA (Association of International Schools in Asia) competition.

KISJ hosts a TEDx (independently organized TED talk event) each year. The first event held in January 2017 featured five local adult speakers and one student speaker.[15] This was the first TEDx event on the island and one of only a few in Korea that are student driven. The organizing committee of the event is voluntarily composed of students and teachers.

KISJ offers both elective courses and cocurricular programs in visual arts, drama, and music.

At the high school level, students can take Visual Art I and Visual Art II, preparing them well to take the AP Studio Art class if they qualify. Additional visual arts courses include Graphic Design and Yearbook (which focuses on photography and layout design). Students can join the Art for Heart's Sake club or the Canvas club if they want to pursue visual arts outside of class. Students display their artwork yearly at the Tri-School Art Opening in collaboration with the other schools in the Global Education City, and they also display their work at Winter Arts Day – a yearly art showcase that involves elementary, middle, and high school students.

In the high school theatre department, students can take Theatre I and Theatre II courses, which opens the opportunity to take Honors Theatre. The after-school theatre program is very active. KISJ High School Theatre puts on 2 productions each year (a fall play and spring musical). Typically there are 30–40 student cast members per year with an additional 30–40 students crew members working behind the scenes on ticketing, marketing, costume, set, sound, and lighting design. Previous productions include: High School Music-pocalpyse, A Midsummer Night's Dream, Almost, Maine, The Complete Works of William Shakespeare (Abridged), Our Town, The 25th Annual Putnam County Spelling Bee, 7 Stories, and Urinetown: The Musical! KISJ Theatre also attends the ISTA (International Schools Theatre Association) conference once per year, and runs a student-produced film-festival and play-writing festival.

In grade five, students have the choice of taking band, orchestra or choir and can participate in one selection each semester. By the time students reach high school, they can take Band and Honors Band, Choir and Honors Choir, or Orchestra and Honors Orchestra elective courses. In middle and elementary school, musical ensembles perform at Winter Arts Day, but at the high school, Band/Orchestra perform in two concerts held in the KISJ Performing Arts Center (PAC) yearly, and Choir performs in two concerts yearly (in addition to performance at music festivals). There are many music-related clubs in the high school including the Tri-M Music Honor Society, a jazz band called "Gold Pasta," and an Orchestra club.

Elementary School students choose from different activities on a quarterly basis, for example: robotics, coding, and sports.

Middle School students participate in Exploratory Courses, for example: golf, chess, mechanics, and strings.

High School students participate in over 30 clubs, for example: National Honor Society, Mu Alpha Theta,[16] Key Club, Global Issues Network, and Model United Nations (MUN). The MUN club founded the only MUN conference in the Global Education City, called GECMUN. GECMUN was the first MUN conference in South Korea to offer "crisis committees" and grown from a small conference with 50 students in 2015 to a conference with 300+ students hosting schools from around Asia.[17]