ISS International School

ISS International School is Singapore's oldest IB school, authorised for all three student-facing IB programmes — PYP, MYP, and Diploma — since the earliest days of the IB organisation. Founded in 1981, ISS has built nearly five decades of IB expertise, and this depth of institutional knowledge is reflected in consistently strong student outcomes and a faculty deeply versed in the IB philosophy and assessment framework.

Located in Alexandra, just minutes from the CBD and easily accessible from Queenstown, Buona Vista, and Harbourfront, ISS occupies a prime central-south position that appeals to families living in or near the city. The school is smaller than many Singapore international schools, with a total enrolment of around 600 students — a deliberate choice that enables a highly personalised educational experience and close relationships between teachers, students, and families.

ISS is particularly noted for its strong arts programme, its committed international-mindedness, and its ability to successfully integrate students arriving mid-year from diverse educational backgrounds. The school's IB Diploma results are consistently impressive, and graduates proceed to universities across the world including top institutions in the US, UK, Switzerland, and Asia. For families seeking a boutique, deeply IB-committed school in a central location, ISS International School is among Singapore's finest options.