INTERNATIONAL SCHOOL OF ATHENS

What INTERNATIONAL SCHOOL OF ATHENS does

International School of Athens (ISA) is a private English-medium international school headquartered in Kifissia, a northern suburb of Athens, founded in 1972 and operating across two campuses (a main campus on a 6,100 m² landscaped site and a refurbished Early Years villa). It delivers the full International Baccalaureate Continuum — Early Years (ages 2.5-5), the Primary Years Programme (KG to Grade 5), the Middle Years Programme (Grades 6-10), and the IB Diploma Programme or College Preparatory track (Grades 11-12) — and is the only IB Continuum World School in Athens taught in English, with Middle States Association accreditation since 1984. The school serves a multicultural community representing 50+ nationalities and reports 98% full IB Diploma achievement versus a global average of 82.6% (2026 results), alongside a 95% university placement rate.

The school's core "technology" is the IB curriculum framework, delivered through CleverBoards for interactive learning, a 1:1 iPad programme in Grades 4-6, and computer labs. Operational and learning systems are built on ManageBac (learning management), Edu4Schools (school management and parent portal), and Microsoft Teams (communication and homework). Supporting academic programmes include the Dukes Plus Future Ready Programme (university/careers guidance, inherited from the 2024 Dukes Education acquisition), an English Language Support (ELS) programme for non-native speakers in Grades 1-8, a Saturday School for ages 3-17, and a Summer School for ages 2.5-16.

ISA generates the bulk of its revenue from annual tuition fees (EUR 8,700 for Nursery up to EUR 15,000 for Grades 11-12), paid in installments, with supplementary recurring revenue from optional transportation (EUR 2,100-2,800), Saturday School, Summer School, and learning support, and one-time fees from registration (EUR 600-1,700) and IB examinations. Go-to-market is direct-to-consumer via Open Days, campus tours, a multi-step admissions process (enquiry, trial day, application, acceptance), and social media; the 2024 acquisition by Dukes Education added group-level brand and professional development support. The school had 132 employees and was accepting applications for Academic Year 2026-27 at the time of the source data.

Name

INTERNATIONAL SCHOOL OF ATHENS

Legal name

I.S.A. THE INTERNATIONAL SCHOOL OF ATHENS LIMITED

Website

https://isa.edu.gr

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

101–250 employees

Short description

International School of Athens is a private English-medium school in Kifissia, Greece, delivering the full IB Continuum (ages 2.5-18) to a multicultural community of 50+ nationalities. It operates under Dukes Education ownership since 2024.

Ownership category

akta.pro rank

Product category

K-12 International Education

NAICS

Elementary and Secondary Schools (6111), Language Schools (61163), Exam Preparation and Tutoring (611691)

SIC

Services-Educational Services (8200)

akta.pro primary industry

International/Global Curriculum Schools (IB, Cambridge, etc.) (EDAJABAG)

akta.pro secondary industries

International Curriculum Early Learning Academies (e.g., IB Early Years) (EDACADAK), AP/IB & Subject-Specific Standardized Exams Prep (AP, IB, SAT Subject legacy, subject exams) (EDANABAE), Exam Preparation Language Programs (IELTS/TOEFL/DELE/DALF/HSK, etc.) (EDAIAEAD), K-12 & School-Based Language Exam Prep (AP, IB, IGCSE/A-Levels) (EDANACAE)

Keywords

• International baccalaureate education
• K-12 private schooling
• English-medium instruction
• University placement services
• Early years education

Headquarters

HQ city

Kifissia

HQ country

Greece

HQ region

Europe

Offices2 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Tuition Fees: Primary revenue stream from tuition fees charged per academic year across multiple grade levels from Nursery through Grade 12. Fees range from 8,700 EUR (Nursery) to 15,000 EUR (Grade 11-12) annually, payable in four installments.
2. Registration Fees: One-time non-refundable registration fees: 1,700 EUR for KG-12, 600 EUR for JPre-KG to Pre-KG.
3. Transportation Services: Optional bus transportation service with 13-15 school buses providing door-to-door service. Fees range from 2,100-2,800 EUR for KG-12, 2,100 EUR for JPre-KG to Pre-KG.
4. Summer School Programme: Summer programmes for children ages 2.5-16 running from mid-June to end of July. Early Years fees from 270-1,200 EUR (ISA students), Main school from 150-490 EUR transportation.
5. Saturday School: Saturday English language classes for children ages 3-17 from September to May. Fees from 960-1,270 EUR depending on programme level, with optional bus service at 650 EUR.
6. IB Examination Fees: IB exam fees of 1,200 EUR for Grade 12, e-assessment fee of 400 EUR for Grade 10, and achievement testing fee of 400 EUR.
7. Learning Centre Support: Specialized learning support services with Learning Centre 1 at 1,700 EUR and Learning Centre 2 at 2,700 EUR.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

ISA delivers the full International Baccalaureate Continuum programme taught in English for students aged 2.5–18, spanning the Early Years Programme, the IB Primary Years Programme (PYP), the IB Middle Years Programme (MYP), and the IB Diploma Programme / College Preparatory Programme. In addition to its core academic curriculum, the school offers Saturday School and Summer School English-language programmes, after-school activities, English Language Support (ELS), university placement services through the Dukes Plus Future Ready Programme, and optional door-to-door bus transportation.

Product overview

The International School of Athens (ISA) offers a unified IB Continuum educational programme taught in English, spanning Nursery to Grade 12 (ages 2.5-18). The core portfolio consists of four integrated academic programmes: the Early Years Programme for ages 2.5-5, the Primary Years Programme (PYP, KG–Grade 5), the Middle Years Programme (MYP, Grades 6-10), and the IB Diploma Programme / College Preparatory Programme (Grades 11-12). ISA is the only IB Continuum World School in Athens offering all three IB programmes in English. Supporting the academic core, ISA provides a Saturday School (English language learning for ages 3-17), a Summer School Programme (June–July), an After-School Activities Programme, an English Language Support (ELS) service, and a University Placement Service powered by the Dukes Plus Future Ready Programme. Faculty and staff additionally access proprietary Dukes Education professional development platforms. All students and parents interact with ISA through the TEAMS communication/learning platform and the Edu4Schools management platform, with ManageBac serving as the learning management system.

Differentiator

Problem solved

Functional benefit

Products and services

• Early Years Programme International early years education for children aged 2.5-5 (Nursery through Pre-KG), delivered in a secure and nurturing English-language environment through a holistic curriculum emphasising hands-on activities, music, arts, crafts, gardening, teamwork, language development, and motor skills.
• Primary Years Programme (PYP) IB Primary Years Programme covering Kindergarten through Grade 5, focused on holistic development through inquiry-based learning, nurturing academic achievement, social and emotional well-being, physical development, and creative and personal expression.
• Middle Years Programme (MYP) IB Middle Years Programme for Grades 6-10, providing a learning framework that encourages students to become creative, critical, and reflective thinkers through eight subject groups including Language and Literature, Mathematics, Sciences, and Arts.
• IB Diploma Programme (IBDP) Rigorous two-year IB Diploma Programme for Grades 11-12, culminating in external examinations and the internationally recognised IB Diploma. Includes core requirements: Theory of Knowledge, Extended Essay, and CAS (Creativity, Activity, Service).
• College Preparatory (CP) Programme / ISA High School Diploma Alternative two-year programme for Grades 11-12 culminating in the ISA High School Diploma, accredited by the US-based Middle States Association. Students may combine CP with additional IB courses to earn IB Certificates alongside the diploma.
• Saturday School English-language learning programme for children aged 3-17, running every Saturday from September to May (10:00-15:00). Open to both ISA students and external students, following CEFR guidelines, with small class sizes and full access to ISA facilities.
• Summer School Programme Daytime summer programme for children aged 2.5-16, running from mid-June to end of July. Builds English language confidence in a safe, supportive environment through educational experiences combined with fun indoor and outdoor activities including sports, art, drama, and field trips.
• University Placement Service University guidance service available to all ISA students, providing advice and support through the university selection and application process, including personal statement guidance, course selection, and access to university prospectuses and fairs.
• Dukes Plus Future Ready Programme Comprehensive university and careers support programme exclusive to Dukes Education schools, including Dukes Career School workshops (for Grades 9-11), accredited university and careers advisors, a Careers Centre of Excellence, and the Dukes Plus Online Careers Institute offering fortnightly online lectures from university and industry leaders.
• After-School Activities Programme Extracurricular programme offering a wide range of activities including sports (soccer, basketball, volleyball, tennis, gymnastics, fencing), arts (art, drama, choir), STEM/STEAM clubs, forensics, journalism, Model United Nations, chess, and more, spanning Early Years through MYP.
• English Language Support (ELS) Dedicated English Language Support programme from Grade 1 to Grade 8 for students not yet proficient in English, providing four study periods per week to develop speaking, listening, reading, and writing skills for mainstream curriculum access.
• School Bus Transportation Optional door-to-door bus transportation service using 13-15 school buses covering most areas of greater Athens, available for enrolled students at additional cost.

Quantifiable outcome

• 98% full IB Diploma achievement rate (2026 results)
• +4 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature3 records

Partnerships

Seven partnerships are on record, tiered core, flagship and minor.

• Austrian Institute ÖSDcoreStrategic or Co-development Partner · 1 January 2026ISA became an official partner school of the Austrian Institute ÖSD in 2026, enabling students to take internationally recognized ÖSD German language examinations at ISA. The partnership provides exclusive exam access for ISA students and additional support from the institute to enhance the German language programme.
• Dukes EducationflagshipOthers · 1 January 2024ISA joined Dukes Education in 2024, becoming part of a family of nurseries, schools, and colleges across the UK and Europe. Dukes Education provides strategic oversight, professional development platforms, the Dukes Plus Future Ready Programme for university and career guidance, and operational support including School Evaluation and Quality Review (SEQR). Each school maintains its own identity while benefiting from shared resources and expertise.
• International Baccalaureate Organization (IBO)flagshipStrategic or Co-development PartnerISA is an authorized IB World School offering all three IB programmes (PYP, MYP, IBDP). The school follows IB philosophy focusing on nurturing students' individual talents and connecting classroom learning with real-world experiences. IB provides curriculum frameworks, assessment standards, and authorization/accreditation.
• LB CreationsminorOthersOfficial school uniform provider with over 20 years of experience. LB Creations provides high-quality, durable uniforms with OEKO-TEX Standard 100 certified fabrics that are skin-friendly, hypoallergenic, and environmentally responsible.
• Edu4SchoolscoreTechnology or IntegrationEdu4Schools is the ISA management platform used by parents to register for after-school clubs, book appointments, access school calendar, complete re-enrollment forms, view timetables, read news and access school services.
• ManageBaccoreTechnology or IntegrationStudent information and learning management system for ISA, providing student accounts, academic tracking, and learning resources for the IB curriculum.
• Microsoft 365 (TEAMS)coreTechnology or IntegrationTEAMS platform used for communication, homework assignments, announcements, photos, online meetings, and parent-teacher communication. Primary digital communication and learning platform at ISA.

Scale indicators10 records

Recent moves16 records

Expansion highlights5 records

Direct peers

• Campion School Athens: British international school in Athens offering IB programmes and serving internationally mobile families in the same catchment area. Competes head-to-head with ISA for premium international education market share.
• International School of Brussels: European IB Continuum school with comparable international profile, multilingual environment, and dependency on expat/diplomatic community. Strong operating benchmark for ISA's scale and offering.
• St. Lawrence College Athens: International school in Athens operating parallel IB programmes across primary and secondary years. Direct competitor for ISA's families and overlapping admissions market.
• King's College Madrid: Sister school within Dukes Education network offering British international education in Europe. Most operationally comparable peer - shared curriculum resources, cross-school referrals, and Dukes Plus Future Ready Programme access.
• ACS Athens: American Community Schools in Athens is a competing international school offering IB programmes (PYP, MYP, DP) and AP courses to a similar expatriate and Greek family market. Most directly comparable peer for ISA in Athens.
• International School of Geneva (Ecolint): Pioneering IB Continuum school in Europe serving internationally mobile families and offering the full PYP/MYP/DP pathway. Closely comparable in curriculum positioning and target demographic.
• TASIS The American School in Switzerland: Swiss international school founded by Mary Crist Fleming, who also led ISA when it operated as TASIS Hellenic International School from 1979. Direct lineage and shared educational philosophy make TASIS a historical and operational peer.
• Byron College Athens: British international school in Athens offering English-medium education with IB pathway. Targets the same expatriate and Greek-returning family segment as ISA.

Broad incumbents

• Dulwich College International: Established international schools network operating premium English-medium schools across multiple geographies with strong IB offerings. Broad incumbent competitor for internationally mobile families considering European cities.
• HAEF / Athens College: Established Hellenic-American Educational Foundation institution in Athens offering K-12 education with international orientation. Larger and more established than ISA, serving an overlapping but broader Athens market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/ISAschoolOfAthens
• LinkedInlinkedin.com/company/isa-the-international-school-of-athens
• Instagraminstagram.com/international_school_of_athens

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 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 ATHENS