← Back to homeInternational School of Luxembourg
Luxembourg, Luxembourg · est. 1962 · Private
Illustration · Luxembourg
The International School of Luxembourg (ISL) is an independent, non-profit, university-preparatory day school from Early Years to Grade 12. It was started in 1962 by Mrs Batten in her home in Strassen; it has carried its current name since 1999 and has been on the Merl campus since 2000. According to the school's own profile it has about 1450 students from more than 60 countries. All subjects except modern languages are taught in English: the school states that students 'take all other classes in English'. French is compulsory from Early Years, and German or Spanish is added in Grades 6-10. Programmes: IB PYP in the lower grades, IB MYP (candidate status) in Grades 6-8, Cambridge IGCSE in Grades 9-10, and in Grades 11-12 the IB Diploma or IB courses together with the ISL High School Diploma, plus an alternative Global Impact Diploma pathway. The class of 2025 averaged 32.5 IB DP points against a global average of 30.6.
Key facts
Tuition
≈ $23 137–27 369 a year
20 480–24 226 EUR
Programmes
IB · PYP, DP · Cambridge · IGCSE
Admits from
3 years · Pre-School
Languages of instruction
English
Languages taught
French, German, Spanish
Registration fee
≈ $339
300 EUR
About the fees Annual fees for the 2026-2027 school year include tuition, the School Growth Fund (EUR 350) and the Stability Reserve: EUR 20480 for Foundations - Grade 1, EUR 22118 for Grades 2-5, EUR 24005 for Grades 6-8, EUR 24226 for Grades 9-12. The school says its fees already reflect the state subsidy for private schools, averaging about EUR 12755 per child. Fees include all external examinations, including IB exams. Mandatory residential trips in Grades 2-10, snacks in Grades 1-5, lunches and activities are charged separately.
Admissions The school says it 'exists primarily to meet the needs of international, expatriate children who require an English-speaking education' and also deliberately keeps a proportion of students from the permanent local community. Students must live with a parent or recognised guardian. Early Years entry from age 3 (by 31 August of the entry year), with no exceptions. Process: online application, documents and teacher recommendations with English translation, family interview; from Grade 6 CAT4 and an English placement test for non-native speakers, for Grade 11 also an essay and a maths test. Students new to the IB are not accepted into Grade 12; transfer is possible only from another IB programme by arrangement. Vaccination according to the Luxembourg Ministry of Health schedule is required. Places depend on availability, otherwise a waiting pool.
Stages and year groups Grades Foundations - Grade 12. Early Years groups Foundations, Pre-Kindergarten and Kindergarten (ages 3-6), Lower School Grades 1-5, Upper School: Middle School Grades 6-8 and High School Grades 9-12. Programmes: IB PYP (Early Years and Lower School); IB MYP, for which the school is still a 'Candidate School' and currently teaches Grades 6-8, with all of Grades 6-10 moving to MYP by the 2027-2028 school year; Cambridge IGCSE in Grades 9-10; in Grades 11-12 the IB Diploma or IB Course Certificates together with the ISL High School Diploma (22 credits over Grades 9-12), or the ISL High School Diploma alone; an alternative two-year Global Impact Diploma pathway with projects and internships.
Address 36, boulevard Pierre Dupong, L-1430 Luxembourg
Accreditations and programmes verified against official registries
IB · PYP, DP · authorised programmeCambridge · IGCSE · authorised programmeCIS · accreditationMSA · accreditationThe IB register lists the Primary Years and Diploma Programmes at the school, and the Cambridge register names it as a Cambridge centre. It is accredited by CIS and by MSA (Middle States Association): by MSA since 1998, with the latest review in 2024. For the Middle Years Programme the school says it is still a candidate.
school is in an official registryconfirmed by a school document, by membership or by taking part in a networkclaimed by the school, no confirmation, not counted in the scoreGuide to all organisations → What stands behind each entry
IBInternational Baccalaureate
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: PYP (ages 3-12), DP (ages 16-19). PYP is the primary stage, ages 3 to 12. It is not a set of subjects but a frame for the whole school: learning is built around lines of inquiry, and there are no exams at the end. 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 →CambridgeCambridge International Education
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 →CISCouncil of International Schools
It accredits international schools and is a paying association at the same time. It examines governance and ownership, the curriculum, teaching, student wellbeing, staff and premises; a team of volunteers from other CIS accredited schools visits the school. Membership and accreditation are different things here, and schools confuse them more often than anything else.
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 →MSAMiddle States Association of Colleges and Schools
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 →Exams and destinations from the school's official website
Average IB score
32.5 (world average 30.88)
Exam results IB Diploma results 2025: 110 candidates, average 32.5 points against a global average of 30.6, 98% earned the diploma, 22% bilingual diplomas. SAT, same class: mean 628 in reading and writing and 652 in maths.
Where leavers go: University of Oxford · Imperial College London · King's College London · UCL · University of Edinburgh · University of St Andrews · Durham University · University of Warwick · Trinity College Dublin · KU Leuven · Bocconi University · IE University
and others, 23 universities in the school's list in allClass of 2025 (114 students): 55% went on to study in continental Europe, 26% in the United Kingdom, 10% in the USA and Canada, 9% took a gap year.
Facilities from the school's official website
·Swimming poolnot stated on the website
·Sports hallnot stated on the website
·Laboratoriesnot stated on the website
·Theatre or assembly hallnot stated on the website
✓Library
✓Catering
·School transportnot stated on the website
·Boardingnot stated on the website
Also on site: Sports ground or field · Art studio
Clubs and activities: Model United Nations · Debate · Robotics Club · Formula 1 in Schools · STEM Racing · Coding Club · Maths Team · Science Club · Creative Writing Group · Beekeeping Club · Amnesty International Club · Girlguiding Luxembourg · Mérite Jeunesse (Duke of Edinburgh's Award) · Capoeira · Field Hockey · Swimming
Teaching staff from the school's official website
·Teachers listed by namenot published
✓Teacher qualifications
·Number of teachersthe school does not say
·Students per teacher or class sizenot stated
What the listings show: All teachers are trained and certified in their fields, more than half hold Master's degrees.
Faculty and staff come from more than two dozen countries; the school has over 250 staff. Average experience in education is 18 years, and 12% of teachers have served ISL for 20 years or more.
Safety and wellbeing from the school's official website
·CCTVnot stated on the website
·Security staffnot stated on the website
·Access controlnot stated on the website
✓Nurse or medical room
✓Counsellor
✓Child protection policy
·Staff trainingnot stated on the website
·Anti-bullying policynot stated on the website
Child Protection Policy based on Luxembourg law and the UN Convention on the Rights of the Child; a team of school nurses on site, counselling and access to an educational psychologist for younger pupils. All staff are being trained in first aid, and each building has trained evacuation wardens.
Reviews
No reviews yet. The community rating counts towards the score once a school has five verified reviews - until then we do not show a zero, so as not to mislead.
Criteria breakdown criterion weight in brackets
Academics and programmes (16%)97 Community rating (16%)no dataparent reviews are needed: the criterion switches on at the fifth verified one Exams and destinations (12%) scored on disclosed data80 Safety and wellbeing (12%) scored on disclosed data70 Accreditation and verifiability (10%)100 Teaching staff (10%) scored on disclosed data55 Facilities (10%) scored on disclosed data65 Clubs and activities (8%) scored on disclosed data78 "Scored on disclosed data" stands where we count only what the school has written about itself on its own site: exams and destinations, safety and wellbeing, teaching staff, facilities, clubs and activities. A low score here means the school does not write about this, not that the school does not have it: a school with good security and a sparse site will score low. A school can fill in its profile, and the score will be counted again.
The score is counted from 8 of the 9 criteria.Only those with checkable data count: programmes and accreditations from official registers, the fee from a published price list. Where it says "scored on the median", the school has no data and the middle of the list is put in its place, so that a gap gives no advantage. Admissions, teaching staff and reviews come in as their data arrives.
The full methodology → Similar schools in the country