International School of Luxembourg

What International School of Luxembourg does

International School of Luxembourg (ISL) is a private, independent, university-preparatory day school founded in 1963 and located at 36 Boulevard Pierre Dupong, Luxembourg City. It operates a single campus serving more than 1,300 students aged 3-18 across Early Years, Primary Years (Grades 1-5), Middle School (Grades 6-8), and High School (Grades 9-12), delivered through a vertically segmented programme structure. The academic core is built on the International Baccalaureate framework: ISL is an authorised IB World School offering the Primary Years Programme (PYP), Middle Years Programme (MYP), and Diploma Programme (DP), supplemented by IGCSE qualifications in Grades 9-10 and the school's own High School Diploma. Instruction is delivered in English with additional language pathways in French, German, and Spanish, plus English as an Additional Language (EAL) support.

The school is built on a stack of integrated third-party platforms: OpenApply for admissions, Schoology and Seesaw as learning management systems (Upper and Lower School respectively), Toddle for collaboration and portfolios, iSams as the student information system, Schoolsbuddy for activity sign-ups, and myLunch for catering. Microsoft Office 365 provides single sign-on for staff. ISL holds triple accreditation — IB World School status, ECIS (European Council of International Schools), and MSA-CESS (Middle States Association) — and is a member of the Green Schools Alliance, where it uses the GSA START tool with 53 metrics for sustainability tracking via a student-led Energy Vision Task Force.

Revenue is generated primarily through annual tuition fees paid by families (published in the Schedule of School Fees, billed to a BCEE bank account), with secondary streams from after-school care programmes (Stay and Play, Playground Clubhouse, and a third-party Kidscare by Babilou Family partnership offering extended 07:00-19:00 care) and facility rentals (the soccer field is reported as fully booked). The go-to-market is sales-led, with a structured admissions funnel — online application via OpenApply, age-appropriate assessments (MAP/CAT4 testing for Grades 6-10), individual or group interviews, optional campus or virtual tours, and admissions decisions within 10 school days. Students represent 65+ nationalities, with the largest cohorts from the USA (10.7%), France (9.9%), Italy (9.4%), the UK (8.6%), and Luxembourg (8.5%); 65% of the student body comes from elsewhere in Europe. The institution is governed by a Board of Governors elected by the ISL Association, with day-to-day operations led by Director Iain Fish.

Name

International School of Luxembourg

Legal name

International School of Luxembourg

Website

https://islux.lu

Company type

Private

Founded year

1963

Operating status

Operating

Headcount range

101–250 employees

Short description

The International School of Luxembourg is a private, IB World School in Luxembourg City serving 1,300+ students aged 3-18 from 65+ nationalities. It delivers PYP, MYP, IGCSE, and IBDP programmes with multilingual instruction and comprehensive student support services.

Ownership category

akta.pro rank

Product category

International K-12 Education (IB World School)

NAICS

Elementary and Secondary Schools (6111), Educational Support Services (611710)

SIC

Services-Educational Services (8200)

akta.pro industry

PRIMARYEDAIAEAB

English Language Schools (ESL/EFL)

Education/International Education & Study Abroad/Overseas Language Schools & Immersion Programs

SECONDARYEDANACAB

Academic Language Support (ESL/EFL for School & University)

Education/Tutoring & Test Preparation/Language Tutoring & Exam Prep

Keywords

• International K-12 education
• IB curriculum programmes
• University preparatory school
• Primary secondary education
• Multilingual schooling

Headquarters

HQ city

Luxembourg

HQ country

Luxembourg

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Tuition and School Fees: Annual tuition fees charged to families for student enrollment across all grade levels (Foundations through Grade 12). Fees vary by grade level and are published in annual Schedule of School Fees documents.
2. After-School Care Programs: Stay and Play (Foundations to Kindergarten) free to ISL families, Playground Clubhouse (Grades 1-5), and external Kidscare by Babilou Family service for extended childcare needs from 7:00am to 7:00pm
3. Facility Rentals: School facilities including soccer field (currently fully booked) and other spaces available for external bookings

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

International School of Luxembourg (ISL) is an independent, university-preparatory day school offering international education from Early Years (ages 3-5) through High School (ages 14-18). It delivers International Baccalaureate programmes (Primary Years, Middle Years, and Diploma Programme), IGCSE qualifications, and the ISL High School Diploma, complemented by multilingual instruction (English, French, German, Spanish), learning support services, and an extensive co-curricular programme. The school charges annual tuition fees to families enrolled on campus in Luxembourg City.

Product overview

International School of Luxembourg offers a comprehensive international education programme from Early Years (ages 3-5) through High School (ages 14-18), operating as a single unified school with multiple sections. The institution delivers IB programmes across all levels (PYP, MYP, and Diploma Programme) alongside IGCSE qualifications, complemented by language instruction (French, German, Spanish), English as an Additional Language (EAL) support, Learning Support services, and an extensive co-curricular programme spanning arts, sports, and global citizenship activities. Administrative services include admissions management, parent communication via dedicated portals, and student support systems including higher education counseling and an alumni mentorship programme.

Differentiator

Problem solved

Functional benefit

Products and services

• Early Years Programme International education programme for children ages 3-5 (Foundations, Pre-Kindergarten, and Kindergarten), delivering the IB Primary Years Programme framework through play-based and inquiry-led learning in English with French language exposure.
• Primary Years Programme International education programme for Grades 1-5 (ages 6-10) implementing the IB Primary Years Programme with emphasis on literacy, mathematics, French, arts, music, physical education, and inquiry-based learning.
• Middle School Programme International education programme for Grades 6-8 (ages 11-14) implementing the IB Middle Years Programme across eight subject groups, supporting transition from childhood to adolescence and personal development.
• High School Programme International education programme for Grades 9-12 (ages 14-18) offering Cambridge IGCSE qualifications in Grades 9-10 and the IB Diploma Programme in Grades 11-12 alongside the ISL High School Diploma, with 90% of students pursuing the full IB Diploma.
• Learning Support Services Inclusive support service providing differentiated instruction and small group interventions for students with mild learning differences across the school.
• Learning Assistance Programme (LAP) Targeted academic support service offering additional assistance and interventions for students needing structured learning support beyond standard classroom differentiation.
• Languages Programme Language instruction programme offering English, French, German, and Spanish across the curriculum, with English as an Additional Language (EAL) support for non-native English speakers.
• Higher Education Services University guidance and counselling service supporting Grade 11-12 students through college and university applications to institutions worldwide.
• Clubs and Activities Programme Co-curricular programme covering arts (music, theatre, visual arts), NECIS sports, academic clubs, and global citizenship initiatives including Model UN, the Global Issues Network, and the Duke of Edinburgh's Award.
• After-School Care Childcare service comprising Stay and Play for Foundations to Kindergarten (free to ISL families), Playground Clubhouse for Grades 1-5, and extended care partnerships (e.g., Kidscare by Babilou Family) operating from 7:00am to 7:00pm.
• Alumni Network Lifelong alumni programme connecting graduates through newsletters, reunions, and events, structured around cohorts dating back to the Class of 1973.
• ISL Mentorship Programme Structured mentorship offering that pairs current students with alumni for guidance on higher education choices and career development.

Quantifiable outcome

• 98% IB pass rate
• +2 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration9 records

Feature3 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Green Schools Alliance (GSA)coreStrategic or Co-development PartnerISL is a proud member of the Green Schools Alliance, an organization dedicated to connecting and empowering schools to lead transformation to sustainable, equitable, and climate-resilient future. GSA has over 8000 member schools from more than 90 countries. ISL uses GSA's START (Sustainability Tracking Analytics & Roadmap Tool) with 53 metrics to measure sustainability progress.
• International Baccalaureate (IB)coreTechnology or IntegrationIB World School offering Primary Years Programme (PYP), Middle Years Programme (MYP), and Diploma Programme (DP). ISL deeply committed to IB values and principles including academic excellence, international-mindedness, inquiry, and reflection.
• NECIS (North European Collaborative International Schools)minorStrategic or Co-development PartnerISL participates in NECIS sports leagues for students from Grades 4 to 12, enabling inter-school athletic competitions across Northern European international schools.
• Duke of Edinburgh's AwardminorStrategic or Co-development PartnerISL offers the Duke of Edinburgh's Award programme, an internationally recognized youth achievement award, as part of Global Citizenship activities.
• Kidscare by Babilou FamilyminorChannel Partner/ Reseller/ DistributorExternal after-school childcare service provider operating from Strassen location, offering extended care from 7:00am to 7:00pm for families requiring longer childcare hours.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Regional players

• Frankfurt International School: Large IB World School in Frankfurt offering the full IB continuum plus IGCSE. Comparable scale (1,800+ students), curriculum mix, and multilingual delivery to ISL.
• International School of Düsseldorf: Established IB World School in the German Rhineland serving international families. Comparable to ISL in curriculum structure (IB across all grades), accreditation set, and expatriate community focus.
• American School of Paris: Independent international school near Paris offering IB and Advanced Placement tracks. Comparable to ISL on premium private international positioning and expatriate family target segment.
• British School of Brussels: English-medium international school in Brussels serving expatriate families. Operates in the same Greater Region ecosystem with overlapping curriculum and family demographic.
• International School of Brussels: Leading IB World School in Brussels offering PYP, MYP, and DP to a similarly international community. Compares to ISL on curriculum, accreditation profile, and expatriate family customer base across the Benelux region.

Broad incumbents

• International School of Geneva (Ecolint): One of the oldest and largest international schools in Europe, operating multiple campuses across Geneva. Comparable to ISL on IB continuum, multilingual delivery, and institutional heritage.

Direct peers

• European School of Luxembourg: Government-funded European Schools system serving primarily EU-staff families in Luxembourg. Competes directly for the same multilingual, internationally mobile family demographic as ISL.
• St. George's International School Luxembourg: Long-established English-language international school in Luxembourg offering IB programmes. Direct competitor for expatriate families in the same city with overlapping curriculum and target customer base.
• Lycée Vauban (Luxembourg): French-curriculum international school in Luxembourg City offering strong multilingual education to internationally mobile families. Competes with ISL for French-speaking expatriate households.

Emerging players

• United World Colleges (UWC) movement: Global network of IB Diploma-focused international schools. Comparable to ISL's high school IBDP experience; serves a different residential model but shares curriculum and mission alignment.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UCKMbBNW3pClYwCJA3kw8tMA
• Facebookfacebook.com/ISLux
• LinkedInlinkedin.com/company/international-school-of-luxembourg
• Instagraminstagram.com/isluxembourg
• Xx.com/isluxembourg

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about International School of Luxembourg