ISF International School Frankfurt Rhein-Main
Frankfurt, Germany · est. 1995 · PrivateISF International School Frankfurt Rhein-Main is a private international day school in the west of Frankfurt am Main, founded in 1995, from kindergarten to grade 12. About 800 students from more than 40 countries attend. The main language of instruction is English; all students study German throughout their schooling (as a native or foreign language, at several levels), French or Spanish from grade 6, and Korean and Japanese for native speakers. Teaching follows a structured system with frequent assessment and quick support for students who fall behind. In high school (grades 9-12) students earn the school's High School Diploma together with the IB Diploma or Advanced Placement exams; IGCSE can be taken in grade 10, and there is also a route to recognition equivalent to the Abitur. The state of Hesse recognises the school as an Ergänzungsschule. In 2026, 96% of graduates passed the IB Diploma with an average score of 36. The campus is large, with a swimming pool, a theatre and sports fields, and more than 120 activities run each week.
Key facts
Accreditations and programmes verified against official registries
IB · DP · authorised programmeCambridge · IGCSE · authorised programmeMSA · accreditationCollege Board · authorised programmeSABIS · part of the networkSABIS · school is part of the networkWhat stands behind each entry
A Swiss non-profit, working since 1968. Its programmes are among the most widely recognised school programmes in the world. Authorisation is granted stage by stage, so a school with the final stage does not necessarily run the younger ones; which stages this school holds is set out in the line below.
What the badge means for this school. The school is allowed to run this programme and to award its certificate. This is a confirmation of the programme, not a judgement on the school as a whole. The entry stands in the organisation's public register - anyone can check it. At this school: DP (ages 16-19). DP is the final stage, ages 16 to 19: six subjects plus a compulsory core of theory of knowledge, an extended essay and CAS. The diploma is accepted by universities all over the world, and in a number of countries it counts for admission on the same footing as the local leaving certificate.
Register to check for yourself, and the full guide →Part of the University of Cambridge. It allows a school to teach the Cambridge programmes and to enter pupils for the exams. There are four stages and they are authorised separately: primary, lower secondary, IGCSE and A Level. If the stages are known they are named in the line below; if that line is missing, the school does not publish them, and the Cambridge registry does not show stages either - it gives only the name of the centre, the country and whether private candidates are accepted. Cambridge calls what it does registration rather than accreditation, and the network holds about ten thousand schools.
What the badge means for this school. The school is allowed to run this programme and to award its certificate. This is a confirmation of the programme, not a judgement on the school as a whole. The entry stands in the organisation's public register - anyone can check it. At this school: IGCSE (ages 14-16). IGCSE means exams at around Year 10 or 11, the British counterpart of a lower secondary leaving certificate.
Register to check for yourself, and the full guide →One of the oldest American accreditations, working since 1887 in more than a hundred countries and linked to the Office of Overseas Schools of the US State Department. It judges the school as an institution across twelve areas, including finances, governance, premises and student support.
What the badge means for this school. The school has been through this organisation's accreditation. It was judged as a whole: governance, safeguarding, staff, premises, teaching. The entry stands in the organisation's public register - anyone can check it.
Register to check for yourself, and the full guide →An American organisation that allows a school to put the letters AP on a pupil's transcript. The permission is granted course by course and tied to a particular teacher, it has to be renewed every year, and College Board reads the course syllabus before granting it.
What the badge means for this school. The school is allowed to run advanced AP courses - not the school as a whole, but one by one: by subject and by teacher. Governance, safeguarding and the primary years are not part of that check. Which subjects are actually approved is visible in the ledger. The entry stands in the organisation's public register - anyone can check it.
Register to check for yourself, and the full guide →Lebanese in origin, with more than seventy thousand pupils in twenty-one countries. It works in different ways: through its own schools, by running other people's under contract, and by simply selling the programme to a school that stays under its own management.
What the badge means for this school. The relationship is set out in a commercial contract. Under the licensing model SABIS neither owns nor runs the school at all: the badge means a package of programmes and methods was bought, not that anyone vouches for how the school works. The entry is confirmed in the organisation's open directory.
Register to check for yourself, and the full guide →Advanced Placement: American advanced courses for the senior years. The exam for a course is set and marked by the College Board, not by the school. A good result is counted by American universities as a first-year course already passed, which saves a student time and money.
What this means for this school. A school does not get to call a course AP automatically: the College Board reads the course syllabus and approves it separately for every subject and every teacher, and the permission has to be renewed each year. Every approved school in the world is listed in the open AP Course Ledger, and this school's entry there stands as a line in the accreditation block above. How many courses a school is approved for, and in which subjects, the ledger does not show in its general listing. AP has no leaving certificate of its own: it sits on top of the school's main programme rather than being a separate system.
A programme written by the school or its operator, with no independent organisation behind it: the rules are written by the same people who teach to them. There is no outside register to check such a programme against.
What this means for this school. This does not mean the teaching is poor: it means the content can be judged only from the school's own account of it. What to look at here is something else - the accreditation of the school as a whole, and the outside exams its leavers sit.