Costeas-Geitonas School vs International School of Athens

	C Costeas-Geitonas School Athens, Greece	I International School of Athens Athens, Greece
Snapshot	Snapshot
Fees / year	Fees / year €8,400 - 13,600	Fees / year €8,700 - 15,000
Age range	Age range 3 - 18 years	Age range 3 - 18 years
Type	Type Co-educational	Type Co-educational
Curriculum	Curriculum IB (PYP), IB (MYP), IB (DP)	Curriculum IB (PYP), IB (MYP), IB (DP)
Pupils	Pupils —	Pupils —
Typical class size	Typical class size —	Typical class size —
Instruction language	Instruction language English	Instruction language English
Opened	Opened 1973	Opened 1972
Bus service	Bus service Yes	Bus service Yes
Essentials	Essentials
Location	Location CGS is located in Pallini, Attikis, 15351, Greece. The Pallini area is part of the Attica region near Athens. The campus is accessible by local roads and is served by CGS's transportation services.	Location 42 Artemidos Street and Xenias Street, Kifissia, 145 62, Greece. The campus is located in Kifissia within the Athens metropolitan area. Bus service is provided in most parts of the greater Athens area, with central pickup points along routes.
Stages	Stages Pre-School & Kindergarten / IB PYP; Primary School / IB PYP; Middle School / IB MYP; High School; IB Diploma Programme	Stages Kindergarten; Primary Years Programme (PYP); Middle Years Programme (MYP); High School; IB Diploma Programme (DP).
School type	School type The school is one of Greece's oldest and most prestigious private schools.	School type PRIVATE
Pupil nationality mix	Pupil nationality mix —	Pupil nationality mix —
Additional learning support	Additional learning support CGS provides inclusive education with a School Counseling Department (SCD) and a Learning Support Team (LST) to support students with learning, social and emotional needs, medical conditions, or mobility challenges. The SCD offers counseling and a range of support services; accommodations include differentiated instruction, extended time, and individualized support plans as needed.	Additional learning support The Learning Center provides psychological counseling and learning support for PreK–12, including psycho-educational counseling, referrals to specialists, and individualized educational plans for students with learning differences.
Country affiliation	Country affiliation Greece	Country affiliation Greece
Religious affiliation	Religious affiliation —	Religious affiliation —
School day structure	School day structure —	School day structure School day runs from 8:30 to 16:00, Monday to Friday.
Bus service details	Bus service details CGS offers a bus service with defined transport zones (Zone A–Zone E) and corresponding costs for the 2025–2026 academic year.	Bus service details Bus service is provided in most parts of the greater Athens area; pick-up points are central along routes, with door-to-door service for primary students when possible. All school buses are owned by the school and drivers and bus monitors are school employees.
Fees	Fees
Fee details	Fee details Overview (Academic year 2025–2026) Application & registration fees - Application fee (one-off, non‑refundable): EUR 50. - New‑student registration fee (one‑off, non‑refundable): EUR 150. Annual tuition by year group (gross annual amount) and typical payment instalments - Pre‑K4 / Kindergarten (ages 4–6): EUR 8,400 per year. Instalments under the standard schedule: 1st instalment (40%): EUR 3,360; 2nd instalment (30%): EUR 2,520; 3rd instalment (30%): EUR 2,520. - Primary School (Grades 1–6): EUR 8,500 per year. Instalments: 1st (40%): EUR 3,400; 2nd (30%): EUR 2,550; 3rd (30%): EUR 2,550. - Junior High / Middle School (Grades 7–9): EUR 8,980 per year. Instalments: 1st (40%): EUR 3,592; 2nd (30%): EUR 2,694; 3rd (30%): EUR 2,694. - Senior High (Grade 10): EUR 8,980 per year. Instalments: 1st (40%): EUR 3,592; 2nd (30%): EUR 2,694; 3rd (30%): EUR 2,694. - Senior High (Grades 11–12): EUR 9,200 per year. Instalments: 1st (40%): EUR 3,680; 2nd (30%): EUR 2,760; 3rd (30%): EUR 2,760. - IB Diploma Programme (Year 1): EUR 13,600 per year. Instalments: 1st (40%): EUR 5,440; 2nd (30%): EUR 4,080; 3rd (30%): EUR 4,080. - IB Diploma Programme (Year 2): EUR 13,300 per year. Instalments: 1st (40%): EUR 5,320; 2nd (30%): EUR 3,990; 3rd (30%): EUR 3,990. How instalments and deposit are handled - Standard instalment schedule: first payment 40% of the total, second payment 30%, third payment 30%. - A registration deposit is required at enrolment and is deducted from the first instalment: EUR 1,600 per student for most year groups; EUR 2,000 per student for IB Diploma Programme entrants. The deposit is payable upon completion of registration. - Families may choose to pay annually; a 3% discount applies for full annual prepayment when made by the stated prepayment date. Billing schedule and payment terms (dates used for scheduling and invoicing) - Invoicing periods and standard due dates: 1st instalment due mid‑September, 2nd instalment mid‑December, 3rd instalment mid‑March. Invoices are issued before the provision of the service and are produced up to the 10th working day of each month. - Specific instalment dates used in the published schedule: 15 September (1st instalment, 40%), 15 December (2nd instalment, 30%), 15 March (3rd instalment, 30%). The deposit is credited against the first instalment. Transport (school bus) fees - Annual transport fees by zone (charged in September): Zone A EUR 1,400; Zone B EUR 1,600; Zone C EUR 1,800; Zone D EUR 1,900; Zone E EUR 2,100. A 50% discount is available for single‑direction use where space permits. Transport fees are billed annually. Food service / catering fees - Food service fees (annual): 1 day/week EUR 275; 2 days/week EUR 545; 3 days/week EUR 815; 4 days/week EUR 1,075; 5 days/week EUR 1,250. For younger grades where meals are included, this is reflected in the tuition. Food service cancellations require one month's notice. Other compulsory or recurring charges - Inspired Metaverse fee: EUR 50 annually (charged in October) for the listed grade groups. - IB examination charge (applies to IB Diploma exam year): EUR 750 annually (charged in November) where applicable. - Afternoon zone (SMART) activities, extracurricular activities, school trips, external events, academic contest fees, university‑application support and other optional services are charged separately when used; these are billed per period or per event as applicable. Uniforms, books and materials - School uniform and consumable educational materials are not included in the published tuition figures and are charged separately. Sibling discounts and other discounts - Sibling discounts (non‑combinable and applied to the younger child): second child receives 8% off tuition of the compulsory programme; third child receives 40% off tuition of the compulsory programme and 50% off transport; fourth child receives 100% (tuition and transport). - The 3% prepayment discount for full annual payment is available when the full amount is settled by the stated prepayment deadline. Refunds and cancellation terms - Application fee and the one‑off new‑student registration fee are non‑refundable. - Deposit refund on cancellation of registration before the start of the academic year: 100% refund if cancellation occurs by the specified early deadline; 50% refund if cancelled by the subsequent deadline; no refund of the deposit after the final deadline. Advance notice periods and exact calendar cutoff dates are used to determine eligibility for refund. - For termination of schooling or termination of transport service during the year, one term's prior written notice is required. For termination of catering, one month's prior written notice is required. Refunds or credits are handled in line with billing and invoicing procedures. Payment methods accepted - Payments may be made by bank transfer or by debit/credit card. Invoices are issued prior to service provision and adjustments are made via credit notes where applicable. Notes on additional charges and timing - Certain optional programmes and activity fees are announced before the start of the school year and charged when the activity takes place; SMART (afternoon zone) enrolment is term‑based and requires commitment for the full term. Changes in SMART enrolment in the first term are generally permitted up to the specified change deadline without charge. (End of fee overview)	Fee details Application / Registration fees - Registration fee (one-off) for KG – Grade 12: EUR 1,700. - Registration fee (one-off) for Junior Pre‑KG & Pre‑KG: EUR 600. Tuition fees by year group (amounts per installment and annual total) Payment is split into four installments labeled: In advance, Sept. 04, Nov. 06, Jan. 15. The installment amounts and totals below are stated in euros. - Nursery: In advance EUR 1,800; Sept. 04 EUR 2,300; Nov. 06 EUR 2,300; Jan. 15 EUR 2,300; Total EUR 8,700. - Junior Pre‑KG & Pre‑KG: In advance EUR 1,800; Sept. 04 EUR 2,300; Nov. 06 EUR 2,300; Jan. 15 EUR 2,300; Total EUR 8,700. - Kindergarten: In advance EUR 4,500; Sept. 04 EUR 2,000; Nov. 06 EUR 2,000; Jan. 15 EUR 2,000; Total EUR 10,500. - Grade 1–2: In advance EUR 5,500; Sept. 04 EUR 2,500; Nov. 06 EUR 2,500; Jan. 15 EUR 2,500; Total EUR 13,000. - Grade 3–5: In advance EUR 6,000; Sept. 04 EUR 2,500; Nov. 06 EUR 2,500; Jan. 15 EUR 2,500; Total EUR 13,500. - Grade 6–9: In advance EUR 6,500; Sept. 04 EUR 2,500; Nov. 06 EUR 2,500; Jan. 15 EUR 2,500; Total EUR 14,000. - Grade 10: In advance EUR 7,000; Sept. 04 EUR 2,500; Nov. 06 EUR 2,500; Jan. 15 EUR 2,500; Total EUR 14,500. - Grade 11–12: In advance EUR 7,500; Sept. 04 EUR 2,500; Nov. 06 EUR 2,500; Jan. 15 EUR 2,500; Total EUR 15,000. Extra / additional fees - IB examination fees (Grade 12 only): EUR 1,200. - e‑Assessment fee (Grade 10 only): EUR 400. - Achievement testing: EUR 400. - Learning Centre fees: Learning Centre 1 EUR 1,700; Learning Centre 2 EUR 2,700. - School transportation (bus) fees for KG – Grade 12 range by route from EUR 2,100 to EUR 2,800 (specific route charges listed below). Junior Pre‑KG / Pre‑KG bus fee: EUR 2,100. - Route 1 (Kifissia, N. Erythrea, Kastri, Ekali): EUR 2,100. - Route 2 (Marousi, Filothei, Psychiko, N. Iraklio, Chalandri, Melissia): EUR 2,300. - Route 3 (Dionysos, Anoixi, Ag. Stefanos, Pendeli, Thrakomakedones): EUR 2,400. - Route 4 (Kolonaki, Cholargos, Papagou, Ag. Paraskevi, Vyronas, Peristeri): EUR 2,600. - Route 5 (Kallithea, N. Smyrni, Faliro): EUR 2,800. - Route 6 (Glyfada, Vari, Vouliagmeni, Voula): EUR 2,800. Discounts and prepayment - Sibling discounts: 5% for the second child; 7% for the third child; 10% for the fourth child or more. - Alumni discount: 5%. - Prepayment discount: 2% for payments made by July 31 (applies to prepayment conditions described by the school). Billing schedule and payment terms - Tuition is billed in four installments with the following payment points: In advance, Sept. 04, Nov. 06, Jan. 15. Installment amounts are those listed under each year group above. - Accepted payment methods: credit card (VISA, MasterCard, AMEX, UnionPay) and bank remittance / direct deposit to the school's beneficiary account. Bank details provided for remittance include Alpha Bank (SWIFT/BIC CRBAGRAA, IBAN GR60 014 0342 0342 0023 2000 2338) and Eurobank (SWIFT/BIC ERBKGRAA, IBAN GR52 026 0284 0000 0302 0026 2143). Boarding fees - Boarding is not offered; the school operates as a day school. No boarding fees apply. Uniform and other routine costs - The school uniform must be purchased from the designated supplier LB Creations; school uniform items and PE kit are required. (Uniform pricing is set by the supplier.) - Additional routine costs that may apply during the year include personal supplies, optional trips, extracurricular activities, and any specific course materials or examination fees (for example, IB exam fees listed above). Refund information (applicable items and conditions) - IB-related registration and subject fee rules: registration and late subject fees are generally non‑refundable once incurred after the first registration deadline; subject and core fees may be refunded to the school if a candidate withdraws between the first and second registration deadlines. Specific conditions and deadlines apply to refunds for IB subject/core fees and retake registrations. Summary of key payment options - Credit card: VISA, MasterCard, AMEX, UnionPay. - Bank transfer / remittance: Alpha Bank (IBAN GR60 014 0342 0342 0023 2000 2338, SWIFT CRBAGRAA); Eurobank (IBAN GR52 026 0284 0000 0302 0026 2143, SWIFT ERBKGRAA).
Diving deeper	Diving deeper
Boarding arrangements	Boarding arrangements —	Boarding arrangements —
Uniform requirement	Uniform requirement —	Uniform requirement All ISA students wear the designated ISA uniform. The uniform includes a polo-type shirt with the ISA emblem, navy bottoms (skirts, culottes, or trousers), a navy ISA sweatshirt, and an ISA winter jacket/vest; uniforms are purchased from LB Creations.
Food options	Food options CGS operates a dining hall serving full-course meals prepared on site daily under the guidance of a school dietician; nuts are not used and seasonal vegetables are organically grown. A vegetarian menu is available on request, and canteens on all levels offer snacks and beverages, with dietary needs sent to the dietician.	Food options Parents may send a packed lunch or order food from the school canteen. Canteen forms are sent home each month and lunches are prepaid and delivered to the homeroom; students in grades 4–6 may purchase lunches, and nuts, chewing gum and carbonated drinks are not allowed.
House system	House system —	House system —
Governance and ownership	Governance and ownership CGS is governed by a Board of Directors. It is part of Inspired Education Group.	Governance and ownership The school is accredited by the International Baccalaureate Organization and the Middle States Association. In June 2024 ISA became a member of DUKES Education.
Academics	Academics
Curriculum details	Curriculum details CGS offers the International Baccalaureate (IB) programmes: Primary Years Programme (PYP), Middle Years Programme (MYP), and Diploma Programme (DP). In the PYP, Greek is the primary language of instruction with English as the secondary language of instruction. CGS provides all three IB programmes for students aged 3–18.	Curriculum details ISA provides an English-speaking, international environment from Kindergarten through High School. The Primary School follows the Primary Years Programme (PYP), the Middle School follows the Middle Years Programme (MYP), and the High School offers the International Baccalaureate Diploma Programme (IB DP) or the ISA High School Diploma. ISA is an IB World School and is accredited by the Middle States Association of Colleges and Schools (MSA-CESS). The ISA High School Diploma is recognized by the Greek Ministry of Education as equivalent to the Greek apolytirio. English is the language of instruction, with English as an Additional Language (EAL) support where needed. The DP is offered alongside the College Preparatory Programme (CP) for students who pursue CP.
Student teacher ratio	Student teacher ratio —	Student teacher ratio —
Exam results	Exam results Class of 2025 IB Diploma Programme results: 100% awarded the IB Diploma; average overall score 36.1 out of 45; two students achieved 45/45; 17% scored 40+; 72% scored 35+; 83% were admitted to their first-choice university; 40% were admitted to a Top 150 university.	Exam results The University Placement Office reports a strong higher education performance. Approximately 95% of ISA graduates are accepted to higher education institutions worldwide. Notable destinations include Imperial College London, King's College London, UCL, McGill University, Berkeley, Stanford University, the University of Edinburgh and Erasmus University. These outcomes reflect the school's preparation for university study.
Higher education progression	Higher education progression Graduates gain admission to universities worldwide. For the Class of 2025, 83% were admitted to their first-choice university and 40% to a Top 150 university. University placements include Ludwig Maximilian University of Munich (LMU), KU Leuven, University of Amsterdam, Trinity College Dublin, and Bocconi University, among others.	Higher education progression Graduates pursue higher education at universities around the world. The University Placement Office provides guidance on applications, transcripts and personal statements. Notable destinations include Imperial College London, King's College London, UCL, McGill University, Berkeley, Stanford, the University of Edinburgh and Erasmus University. These outcomes reflect the school's focus on preparing students for international higher education.
Gifted and talented	Gifted and talented CGS Academia provides enrichment for highly motivated students with high academic performance. The programme offers subjects such as Astrophysics, Visual Arts, Creative Writing, Philosophy, Programming, and Public Speaking. Eligibility includes a GPA of the previous year equal to or greater than 18 and 7/14, with at least four nominations by the subject groups in the grade.	Gifted and talented —
Academic calendar	Academic calendar —	Academic calendar —
Wellbeing & support	Wellbeing & support
Social & emotional learning	Social & emotional learning CGS has Counselling Support Services that promote students' personal development, mental and social well-being, and learning. Experiential activities support social and emotional development at all levels. In the early years, preventive programs focus on emotion recognition and social skills; in later years topics include cyberbullying, identity, and career guidance. Classroom observation helps identify learning strengths and needs and inform support plans. The School Counseling Department includes School Psychologists, a Speech Therapist, an Occupational Therapist and Learning Support Teachers who collaborate with families and teachers to support students.	Social & emotional learning The International School of Athens has a Counselling and Learning Center that provides psychological counseling and guidance for PreK-12 and support for students with learning differences. Through psycho-educational counseling, students, parents and teachers discuss issues related to personal, interpersonal and academic adjustment and wellbeing in private sessions. The Counseling Psychologist collaborates closely with teachers and administrators and with parents to achieve child-centred education across all levels. The Center works with a network of specialists (e.g., child psychiatrists, speech therapists) for referrals as needed. Lectures, seminars and parenting groups are organized on topics of psychological, psycho-educational, academic and career planning interest for students, teachers, and parents.
Special educational needs (SEN)	Special educational needs (SEN) CGS has a Learning Support Programme that provides diagnosis, remedial education and targeted support for learners with learning difficulties. The programme supports the learner individually to bolster self-esteem, educates teachers on coping with learning differences, informs parents about the policy, and provides in-class monitoring and support in collaboration with teachers. The School Counseling Department addresses learning challenges and emotional, social and behavioral needs, and includes staff who work with families to develop appropriate support plans. Early identification and inclusive practices are embedded in CGS's inclusion framework.	Special educational needs (SEN) The Learning Center involves a team of special educators, educational psychologists and counseling psychologists who work with mainstream teachers and administrators to support the social and academic growth of students with learning differences. The program serves a culturally and linguistically diverse population with students that have learning differences. Early Years - The Early Years Psychologist provides social, emotional and academic support in and out of the classroom, counsels and communicates with parents, collaborates with classroom teachers for guidance and support, arranges in-class observations, and organizes parent-coffee meetings. Primary Years Programme - The Learning Center provides services to students with learning differences in one-to-one or small group settings, with a referral and testing process, formal psycho-educational testing, and Individualized Educational Plans (IEPs). Middle Years Programme/ DP - The Learning Center supports inclusion in IB, with students attending 4-8 periods per week depending on need, differentiating the mainstream curriculum, and coordinating with teachers for tests and accommodations as required.
English as an additional language	English as an additional language From age 3 to 6, the languages of instruction are Modern Greek and English; English is taught as an additional language. English as a Language Acquisition course is mandatory for all students, and from age 8 (Grade 3) students choose a second additional language (French, German or Spanish). In the Middle Years Programme, learners receive language teaching in at least two languages, with Modern Greek as Language and Literature and English as Language and Literature or Language Acquisition, and a second additional language from MYP2. In the Diploma Programme, English is the language of instruction, with other languages offered as Group 2 courses (English, French, German, Spanish).	English as an additional language English is the language of instruction. Kindergarten through Grade 3 are accepted with no previous experience of speaking English. Beyond this grade, students will be considered on a case-by-case basis after careful assessment of their English language level. Students needing English support are required to follow the English as an Additional Language (EAL) programme.
Mental wellbeing	Mental wellbeing CGS supports students' mental and social well-being through Counselling services that accompany academic learning. Experiential activities promote social-emotional skills across the school, with targeted support for emotional needs and pathways to additional assessment when necessary.	Mental wellbeing The Counseling and Learning Center provides psychological counseling and guidance to support students' mental wellbeing PreK-12 and offers psycho-educational counseling for personal, interpersonal and academic adjustment. The Counseling Center collaborates with teachers, administrators and parents to ensure child-centered education and to support wellbeing within and beyond the classroom. It works with a network of specialists for referrals, including child psychiatrists and speech therapists. Lectures, seminars and parenting groups address psychological, psycho-educational, academic and career planning topics for students, teachers and parents. The IB Middle Years Programme also recognises the importance of wellbeing, addressing intellectual, social, emotional and physical well-being as part of its education.
Safeguarding	Safeguarding CGS follows the Whole School Inclusion Policy to ensure safe, inclusive education and early identification of learning, emotional and social needs. The School Counseling Department provides support for learning, social, emotional, behavioral, medical, mobility and speech-related needs, and comprises School Psychologists, a Speech Therapist, an Occupational Therapist and Learning Support Teachers. The policy emphasizes collaboration with families and ongoing staff development to implement inclusive practices and accommodations in assessments in line with Greek Ministry of Education and IB policies.	Safeguarding —
Safeguarding policy	Safeguarding policy —	Safeguarding policy —
Facilities	Facilities
Facilities overview	Facilities overview CGS sits on a 67,000 m2 campus with exceptional facilities. It has 103 teaching classrooms, 3 science laboratories, 6 computer labs, Interactive Discovery & Activity Walls, and a Research & Media Library with over 25,000 holdings. Outdoor facilities include an Outdoor Amphitheater, a Music Conservatory, a Dance Studio, a Visual Arts Studio, and a Radio Station. The campus features 2 indoor heated pools, an outdoor stadium and track, 4 basketball courts, a tennis & handball court, a Bookstore, a Restaurant & Club House, and 57 school buses.	Facilities overview The International School of Athens operates three secure campuses located in Kifissia in the Kefalari area. The primary, middle and high schools are housed in a gracious, recently renovated building dating from the early 1900s, providing a distinctive learning environment. Melina's Kindergarten is located nearby, on two villas with gardens for children to play in. The campuses include up-to-date science and computer labs, art studios, libraries, a theatre and a music room to support student learning.
Sports facilities	Sports facilities The school has two indoor heated pools, an outdoor stadium and track, four basketball courts, and a tennis and handball court.	Sports facilities ISA's on-campus facilities include multipurpose courts for basketball, handball and volleyball, and a separate playground for early primary students. Nearby municipal facilities provide an indoor gym, a full-sized football (soccer) field and track and field grounds. The Athletics Programme offers junior and senior varsity volleyball, soccer and basketball, cross country, and intramural sports. Clubs include swimming and tennis, and the school hosts a Beach Volleyball Tournament at Schinias. Competitive teams primarily compete against other international schools.
Academic facilities	Academic facilities The school has 103 teaching classrooms, 3 science laboratories, 6 computer labs, Interactive Discovery & Activity Walls, and a Research & Media Library with over 25,000 holdings.	Academic facilities The school provides up-to-date science and computer labs, art studios, libraries, theatre and a music room to support learning. The ISA Library/Media Centres support the curriculum with a secondary library, a primary library, and a small computer lab. The primary and secondary libraries are fully automated with Winnebago Spectrum 5, enabling students to access information from library or computer lab and to research on the Internet. The reading programme in the libraries fosters lifelong reading, and ICT skills are developed to prepare students for the 21st century.
Extra curricular facilities	Extra curricular facilities The school has a Music Conservatory, a Dance Studio, a Visual Arts Studio, and a Radio Station. It has an Outdoor Amphitheater and an Outdoor Stadium and Track to support performances and sports. Sports-based programs include the Elite Athlete Programme, Juventus Academy Athens, CGS Triathlon Club, and CGS Fencing Cup. The Duke of Edinburgh International Award is offered as part of extracurricular opportunities. The Visual Arts Workshop and Conservatory support arts education beyond regular classes, while CGS Summer and CGS Academia provide additional learning opportunities.	Extra curricular facilities Extracurricular activities include a broad Athletics Programme with junior and senior varsity volleyball, soccer and basketball, cross country, a Beach Volleyball Tournament at Schinias, intramural sports, and clubs such as swimming and tennis, plus ski trips locally or abroad. The Arts programme features a fully active theatre that hosts student productions, including musicals, drama and set design, and a growing choir; annual events include the Winter Show and other concerts. Visual Arts are taught through painting, drawing, sculpture, ceramics and jewelry, with an IB Visual Arts exhibition highlighting student work. Past productions have included musicals such as The Fantasticks, Blood Brothers and Little Shop of Horrors, and Rooftop, a student-devised original musical.
Parent experience	Parent experience
History	History CGS opened in September 1973 in Marousi with 330 students. In September 1981, new premises were inaugurated in Pallini, Attiki. The school became an official University of London GCE Test Centre in August 1993 and established the International Baccalaureate Diploma Programme in September 1994. The Athletic & Cultural Centre opened in 2003, the Alumni Association was re-established in 2005, and CGS rebranded as CGS in 2016. CGS Ellinikon was announced in 2022 with a Memorandum of Understanding to create a new primary and secondary organization, and first CGS Ellinikon students are expected in September 2026.	History The International School of Athens began in Athens in 1972 as the Hellenic International School (H.I.S.), created to provide an international English-language education through British and American programmes, with about 50 students in the first year. In 1979, after taking over the English track of the Ursulines' primary school, H.I.S. became TASIS Hellenic International School under Mary Crist Fleming, the founder of TASIS. In 1984, the school earned accreditation from the Middle States Association of Colleges and Schools. In 1998 ownership changed, and six years later the name was changed to International School of Athens to reflect its increasingly international curriculum; it adopted the IB Diploma Programme and earned IB World School status. In 2024, ISA joined Dukes Education, and today ISA provides international education with a global perspective and a non-discriminatory admissions policy.
Community	Community CGS has an Alumni Association re-established in 2005 with over 4,000 active members. The Parents & Guardians Association and the Athletic Association are integral parts of CGS, contributing to daily life and community ties. CGS hosts events such as the CGS Educational Conference in 2018, SPARK Summer Science Courses with Brown University starting in 2015, and Juventus Soccer Schools. Harvard Graduate School of Education Professional Development seminars for Primary Level teachers were held in 2009.	Community ISA's community events span academics, culture, sport and service. The News feed highlights scholarship exams, a basketball tournament victory, Lunar New Year celebrations, and an Ancient Greece experience. It also features Greek Language Day, La Chandeleur, the Eurasian Schools Debate Championship, a MYP book drive, and Grade 5 Peter Pan performances.
Parent teacher association	Parent teacher association CGS has the Parents & Guardians Association that works with the school on activities and events. The CGS Alumni Association is a network of graduates that supports members and fosters social and professional connections, numbering over 3,500 members. The CGS Athletic Association supports CGS sports and athletic activities. The CGS Parents Association has an online presence as CGS Parents and works to involve families in school life. These associations strengthen the bonds within the CGS family and support school initiatives.	Parent teacher association —
Extra-curricular	Extra-curricular
Academic & intellectual	Academic & intellectual The Junior Elite Athlete Programme is based on the International Baccalaureate Middle Years Programme, and the Elite Athlete Programme is based on the International Baccalaureate Diploma Programme or the Greek General Lyceum. Both are tailor-made educational programmes for students who combine high academic achievement with top athletic performance, delivered through close collaboration between CGS's academic and athletic faculties. The programmes enable daily training in selected sports under top coaches while maintaining a flexible curriculum to accommodate matches and assessments. Guidance and counselling on prospective careers, universities and countries of study are provided.	Academic & intellectual The school has after-school clubs across the Primary and Secondary divisions, broadening students' creativity, social skills and critical thinking. A variety of clubs is offered, including soccer, basketball, volleyball, gymnastics, karate, tennis, swimming, art, dance, STEAM and choir, with new activities added each term. In Middle and High School, the school has an Interscholastic Programme with three team sports (soccer, volleyball and basketball) at junior and senior levels, and participation in local and international tournaments. The University Placement Office provides guidance for university applications and coordinates university representation, fairs and orientation activities.
Arts & creative	Arts & creative The Conservatory offers quality music education with options from individual instrument tuition to theory, solfège, and ensembles, and it prepares students for university musicology studies. Courses are available to students from Kindergarten age up to adults. Student concerts are performed at CGS or other venues, and educational events and seminars with eminent musicians are regularly held.	Arts & creative The school has a broad Art and Performance program with events such as a Christmas Bazaar featuring the ISA Choir and student performances, a Classical Evening Concert, and an After School Theatre Production. An annual Student Art Exhibition showcases work by IB Diploma Visual Arts students, with younger students also displaying artwork. The school has a Tradition of performing arts events including a Talent Show at year's end.
Cultural & language	Cultural & language CGS MUN organizes international Model United Nations conferences. The 20th CGS MUN conference took place December 12–14, 2025. Preparation resources and a governance structure including a Secretariat and student officers support participants.	Cultural & language The school has additional world languages from Grade 1 onwards—French, Spanish, German and Arabic. The school has an International Day that celebrates the community's multicultural identity with booths, displays, costumes and international cuisine. The school is an IB Continuum World School, reflecting its integrated approach to international education.
Social & hobbies	Social & hobbies CGS Triathlon Club trains in triathlon, running, and swimming and participates in inter-club and national events. The Juventus Academy Athens provides football training through Juventus Soccer Schools. The CGS Academies page lists Football, Basketball, Volleyball, Fencing, and Swimming as CGS sports clubs.	Social & hobbies The school has after-school clubs including soccer, basketball, volleyball, gymnastics, karate, tennis, swimming, art, dance, STEAM and choir. The school has bonding trips organized at the start of each academic year to foster new friendships. The school has an annual Talent Show that allows Primary and Upper School students to showcase their talents.
Community & service	Community & service Duke of Edinburgh International Award is offered in collaboration with CGS. The CGS Sports Association organizes sports competitions, seminars, meetings and events promoting fair play and the well-being of body and mind, and participates in competitions organized by third parties.	Community & service The school has a Student Council in the Primary School and a separate council for Middle/High School, with elected representatives and regular meetings. The Student Councils participate in organizing activities and act as a conduit for student opinion. The Student Council also engages in fund-raising activities for local, national and international events.
Leadership & professional	Leadership & professional Guidance and counselling on prospective careers, universities and countries of study are provided. The Duke of Edinburgh International Award is a CGS collaboration that fosters leadership and personal development.	Leadership & professional The school has a student leadership structure with elected representatives and active student councils that organize events and provide student input. The University Placement Office guides graduating students through the university application process and coordinates university representation, fairs and orientation activities. Regular council meetings and organized activities help students develop leadership and collaborative skills.
Lifestyle & wellbeing	Lifestyle & wellbeing Morning training sessions are held up to a maximum of 6 hours per week. The Elite Athlete Programme offers a flexible curriculum, transport by bus, and lunch on training days, plus courses in techniques, tactics, conditioning, emotional support and diet. The CGS Sports Association supports a broad range of clubs—Football, Basketball, Volleyball, Fencing, Swimming—promoting physical development and well-being.	Lifestyle & wellbeing The school has an Athletics Programme offering three team sports (soccer, volleyball and basketball) at junior and senior levels, with practices after school and participation in local and international tournaments. A comprehensive Sports/Activities programme runs across all levels, including events and trips organized by the Athletics Department. The school has a daytime Summer Programme for ages 2½ to 16, focusing on English language development alongside swimming, water sports, other sports, art, drama and weekly excursions.
Language provision	Language provision
Language provision	Language provision Within the timetabled day, CGS offers English, French, German and Spanish; Chinese is available as an extracurricular course. Modern Greek is the official language of instruction for Elementary and Secondary; English is taught as an additional language, and the Diploma Programme is taught in English. From ages 3–6, instruction is bilingual in Modern Greek and English in the Early Years; literacy in Greek and English is emphasized across the school.	Language provision ISA is an English-language school with a strong emphasis on Greek. All students study Modern Greek as either a Language and Literature course or a Language Acquisition course. Students may take up to two Language Acquisition courses in English, Modern Greek, Spanish, French, German, and Arabic. English as an Additional Language (EAL) support is available for students who need it; Greek for Foreigners is offered as a Greek-language program.
Bilingual teaching	Bilingual teaching Dual-language environment in Pre-K and Kindergarten (Modern Greek and English). In Elementary and Secondary, Modern Greek is the official language of instruction; the Diploma Programme is taught in English. English is taught as an additional language within the PYP, MYP and DP, and students study at least two languages in the PYP.	Bilingual teaching English is the language of instruction across ISA's IB programmes. Greek is taught as Modern Greek for native speakers or for foreigners. In addition, students study one more language from French, German, Spanish or Arabic. From Grade 1 through Grade 10, every pupil is exposed to three languages, with English language support provided through an English as an Additional Language (EAL) program.
Immersion programs	Immersion programs From ages 3–6, instruction is in Modern Greek and English in the Early Years, supporting a dual-language Kindergarten and Nursery. In the PYP, English is an additional language and students begin selecting a second language (French, German or Spanish) from Grade 3. In the MYP, students study at least two languages, including Modern Greek and English, with a second additional language option. The Diploma Programme is taught in English.	Immersion programs ISA offers a Saturday English Language Programme for children aged 3 to 17. The program runs on Saturdays from September to May, 10:00 to 15:00, hosted at Melina's Kindergarten.
Reputation	Reputation
Awards	Awards —	Awards —
Accreditations	Accreditations —	Accreditations —
Admissions	Admissions
Admissions	Admissions IB Mission Statement: The International Baccalaureate aims to develop inquiring, knowledgeable and caring young people who help to create a better and more peaceful world through intercultural understanding and respect. To this end the organization works with schools, governments and international organizations to develop challenging programmes of international education and rigorous assessment. School Mission Statement: At CGS we strive to provide an academic setting where every student's skills and character can flourish to the fullest by encouraging meaningful connections between classroom and real life experiences. Our students work in an environment of ongoing inquiry, cooperation and mutual respect as they acquire a high caliber education and positive life attitudes to make a contribution to the world they live in. Philosophy: Our aspiration is to enroll children and parents who match our educational philosophy, learning culture, ethos and values. The school is committed to the principle of equal opportunity in education, and therefore accepts students without discrimination of gender, colour, race, religion or nationality. CGS is a multi-level and multi-faceted school offering the following programmes: Pre-K4 (ages 4 – 5) – IB Primary Years Programme; Kindergarten (ages 5 – 6) – IB Primary Years Programme; Primary School – IB Primary Years Programme (ages 6 – 12); Middle School- 1st grade of High School – IB Middle Years Programme (ages 12-16); High School – 2nd-3rd grade of Lyceum (ages 16-18); International Baccalaureate Diploma Programme (ages 16 – 18). Admission criteria: Applications for admission are received throughout the school year. An offer of admission is made based on availability, are in accordance with the school's policies and Greek Ministry of Education regulations. Admission criteria are based on age, academic skills, attitude to learning, and candidate's personal profile, taking into consideration the overall dynamics of our existing classes. Based on the year level and language proficiency, testing and screening for placement purposes will take different forms, including, but not limited to, consideration of academic performance records, a personal interview, school readiness testing, literacy and numeracy proficiency testing and a review of previous special needs documentation and health records. Within this framework, admission is based on: interview with the candidate; candidate's performance in diagnostic assessment tasks, designed according to age and grade requirements; candidate's previous academic records, where applicable; a pedagogical report completed by the candidate's current teacher(s)/school, where applicable; a signed declaration by at least one of the parents/guardians of the candidate, which is GDPR compliant and would inform the school of all known or diagnosed special educational needs, is required. Accordingly, professional evaluations, along with details of extra educational, emotional and/or social support the candidate is receiving, should also be provided at the time of application. Failure to provide the required documentation in due time may result in the cancellation of admission. Admission decisions: All applications are reviewed by the Admissions Committee, which consists of the head of the level for which the candidate is applying, programme coordinators, Head of Admissions office and representatives from CGS School Counseling Department (SCD). Special consideration is given to eligible applicants who are siblings of currently enrolled students and to CGS staff and CGS alumni families. However, an offer is not guaranteed, as it is subject to standard Admissions procedure. CGS reserves the right to decide against proceeding with the enrollment of a candidate in consideration of learning support resources' availability and in accordance with the school's Policies. In case significant social / emotional / behavioral issues or learning differences arise during the enrollment process at the school, there will be close consultation with parents, and it is possible that accommodations, to allow the student to enroll at CGS may be required. Consequently, additional costs for this service may be incurred. This review may also involve requiring parents to seek external evaluation by an external body. In case the Admissions Committee determines that CGS is unable to support a student's needs, or if parents are unwilling to proceed with the student's evaluation, CGS reserves the right to terminate the enrollment procedure. Once the application is complete, including receipt of school records and confidential recommendations (previous academic records, pedagogical reports, etc.), offers are formally made either via telephone or e-mail within two weeks. Confirmation of offer & enrollment: Offers for admission are to be accepted or rejected by candidate families within one week of receipt by contacting the Admissions office. Once the offer has been accepted, parents will be sent an acceptance letter as well as a Registration Approval Form (RAF). In order to confirm enrollment and reserve a place for the admitted applicant, completion of the RAF and payment of the registration fee (in accordance with the school's fees) are due within 10 days of receipt of the acceptance letter. These commitments must be made on a timely basis so that we guarantee that places are held for admitted applicants who indeed wish to enroll, or we may allocate places to other candidates in the wait pool. Partial refunds are made within specific deadlines in accordance with the school's fee policy. Class Placement: It is our policy to make initial tentative placements of students in classes for the coming year, according to a set of clear and fairly managed criteria, which include: Academic range and balance; Balance between new and returning students; Behaviour issues; Friendships / optimal peer relationships; Gender (in order to maintain a balance in the class); Size of the class; Special needs requirements within the class; Teacher's professional judgement / experience / detailed knowledge of child, considering academic and personal abilities and needs. These recommendations are given very careful consideration by the teachers and will remain tentative until after the arrival and assessment of new students is completed at the commencement of the next year. Reserved places: Special consideration is given to eligible applicants who are siblings of currently enrolled students and the offspring of CGS alumni. Nevertheless, admission is not automatic, and it is dependent on the number of applicants and the number of spaces available in each particular grade, as well as the qualifications of each applicant. Wait pool: When the number of eligible applicants exceeds the availability of spaces for a particular grade, students may be placed in a wait pool until a place becomes available. Effort is made to keep parents of applicants in the wait pool updated regarding enrollment status and to confirm whether they wish to remain in the wait pool. For further information on the enrollment procedure please follow the link: Enrollment Procedure. Review process of CGS whole-school admissions policy: The CGS whole-school Admissions policy has been reviewed following discussions among Programme Coordinators, Principals, Head of School Counseling Department, Head of Admissions office and the Head of school. The review process was completed in June 2022. Tuition fee: Tuition Fees \| Academic Year 2025 - 2026. Pre-K4/IB PYP (4-5 years) 8,400 €; Kindergarten/IB PYP (5-6 years) 8,400 €; Primary School / IB PYP (Grade 1-6) 8,500 € per grade; Junior High School / IB MYP (Grade 7-9) 8,980 € per grade; Senior High School (Grade 10-12) 8,980–9,200 € per grade; IB Diploma Programme (Year 1) 13,600 €, (Year 2) 13,300 €; Transportation (2025-2026) listed by zone; Food Service options and weekly rates are provided. Transportation details include Zone A, B, C, D, and E with corresponding costs. Attachments include CGS Admissions Policy 2022-23 and related materials. Transportation, food service and other fees are also enumerated.	Admissions The school offers the IB Diploma Program. The ISA Scholarship Program awards two IB scholarships for the 2025-2026 school year. To apply for the scholarships, applicants submit the Scholarship Application Form and supporting documents: two Letters of Recommendation from Grade 10 teachers; School Transcripts for Grades 7-9; the final grades for the first term of Grade 10; language certificates if applicable; copies of other records of achievement; and a passport/ID document. Shortlisting for the scholarship considers the applicant's dossier (grades, Letters of Recommendation, transcripts and other records). On the day of the examination, candidates must present identity documents. The scholarship assessment is through written examinations in English and Mathematics. The English examination tests language ability; the Mathematics examination tests the Grade 7-9 material and 3/4 of the Grade 10 syllabus. The examinations are held at ISA's Artemidos 42 & Xenias Street, Kifissia 14562. Exam dates include English (29 March 2025) and Mathematics (29 March 2025). The syllabus examined includes material from Grades 7-9 and the current Grade 10 curriculum. Shortlisted candidates are notified whether they advance to the examination stage.
Scholarships	Scholarships Financial Aid and Scholarship Fund: CGS is offering academic scholarships for the academic year 2026-27. The scholarships are awarded to students who will be attending A' Gymnasium / MYP2, A' Lyceum / MYP5 and the IB Diploma Programme for the academic year 2026-2027. A maximum of 5 Full Scholarships for A' Gymnasium / MYP2; A maximum of 2 Full Scholarships for A' Lyceum / MYP5; 1 Full and a maximum of 3 Partial Scholarships for the IB Diploma Programme. The granting of a Full Scholarship requires an average score of 80% or higher and success in the personal interview (the student profile is consistent with the International Baccalaureate definition for students attending its programmes). The granting of a Partial Scholarship (30%-80%) requires an average score of 60% or higher (the top 10 candidates with the highest score of over 60%) and success in the personal interview (the student profile is consistent with the International Baccalaureate definition for students attending its programmes). Date of Scholarship Exams (Written component): Sunday 7th March 2026. Deadline for submission of application: Tuesday 3rd March 2026. Arrival Time: 8:30-9:00 a.m. Start Time: 9:30 a.m. Duration of Written Exams: 3 hours (1 hour per subject). Candidates will be assessed in the following courses: A' Gymnasium / MYP2: Mathematics (1 hour), Modern Greek Language (1 hour), English (1 hour). IB Diploma Programme (Subjects Duration): English (Part A: Reading Comprehension; Part B: Composition) 1 hour; Mathematics (Part A: 8-10 MCQs; Part B: 4-5 analytical exercises) 1 hour; Critical thinking test (5 MC exercises in English) 30 minutes. Candidates are not tested on specific material; the applicant's previous study should suffice. To participate, applicants must complete the Academic Scholarship Application Form and submit it with the required documents to the Financial Aid and Scholarship Fund by 1pm Tuesday 3 March 2026. Scholarship Application Form for CGS Students; Scholarship Application Form for non-CGS students. For more information: scholarship@cgs.edu.gr. Attachments include sample exam papers for various subjects and levels.	Scholarships The school awards two IB Diploma Program scholarships for the 2025-2026 academic year. Applicants must complete the Scholarship Application Form and submit at least two Letters of Recommendation from Grade 10 teachers, School Transcripts for Grades 7-9, the first-term Grade 10 transcript, language certificates if applicable, copies of other records of achievement, and a passport/ID document. Shortlisting is based on the applicant's dossier. The two scholarships are awarded through written examinations in English and Mathematics; candidates must bring official ID to the exam. The English exam assesses language ability; the Mathematics exam covers the Grades 7-9 material and part of the Grade 10 syllabus. Examinations take place at Artemidos 42 & Xenias Street, Kifissia 14562. For reference, the English and Mathematics exams were scheduled on Saturday, 29 March 2025.
Waitlist	Waitlist When the number of eligible applicants exceeds the availability of spaces for a particular grade, students may be placed in a wait pool until a place becomes available. Effort is made to keep parents of applicants in the wait pool updated regarding enrollment status and to confirm whether they wish to remain in the wait pool.	Waitlist —
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