← Back to homeCosteas-Geitonas School (CGS)
Pallini, Greece · est. 1973 · Private
Illustration · Pallini
CGS (Costeas-Geitonas School, in Greek Εκπαιδευτήρια Κωστέα-Γείτονα) is one of the largest private schools in Greece. It was founded in 1973 in Marousi and since 1981 has been on its own campus in Pallini, about twenty kilometres from central Athens; it is part of Inspired Education Group. The school runs all three IB programmes: the PYP (the first in Greece, authorised in 2011), the MYP (since 2014) and the IB Diploma Programme (since 1994), alongside the Greek national curriculum. Language of instruction according to the school profile: the PYP pre-school classes are bilingual (English and Greek), primary school and the MYP are taught mainly in Greek, and the IB Diploma Programme and the preparatory Pre-IB DP are taught entirely in English. In its 2024-2025 profile the school gives 1975 students; most are Greek nationals, but there is a growing international and bicultural student population from North America, Europe and Asia. By September 2028 the school is opening a second campus, CGS at the Ellinikon, with a dual Greek and international curriculum.
Key facts
Programmes
IB · PYP, MYP, DP · National programme
Admits from
3 years · Pre-School
Languages of instruction
Greek, English
Languages taught
French, German, Spanish, Italian, Chinese, Latin
Registration fee
≈ $56
50 EUR
Admissions The school writes that it accepts students «ανεξαρτήτως φύλου, χρώματος, φυλής, θρησκείας ή εθνικότητας» - «regardless of gender, colour, race, religion or nationality», and that students from other public and private schools in Greece and abroad can apply to the IB Diploma Programme. Applications are accepted all year round if places are available; the application is submitted through OpenApply with a fee. Steps: introduction for the family, a meeting of the child with the head of the level and a school psychologist, then an age-appropriate assessment: school readiness for young children, from grade 2 written work in Greek and mathematics taking English and the second language into account, for Gymnasio and the first year of lyceum (MYP) a diagnostic exam in Greek, mathematics and English, for the upper lyceum and IB subject exams. If there are more applicants than places, admission is by score; priority goes to siblings of students and children of alumni and staff.
Stages and year groups Grades Pre-Nursery - grade 12 (Geniko Lykeio or IB DP). PYP: pre-school classes (ages three to six) and Dimotiko (Apolytirio Dimotikou); MYP: Gymnasio and the first year of lyceum (Apolytirio Gymnasiou and the IB MYP certificate); then a choice for the last two years: the Greek Geniko Lykeio (Apolytirio Genikou Lykeiou, Panhellenic exams) or the IB Diploma Programme in English. In the first year of lyceum students can also take the preparatory Pre-IB DP. IB DP intake: 65% from the school itself, 35% from other schools.
Address Pallini, 153 51 Attica
Accreditations and programmes verified against official registries
IB · PYP, MYP, DP · authorised programmeInspired · school is part of the networkThe IB register lists three programmes at the school: the Primary Years, Middle Years and Diploma Programmes. It shares its roots with Geitonas School in Koropi, but today they are two separate schools with their own websites, campuses and leadership.
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), MYP (ages 11-16), 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. MYP is the middle stage, ages 11 to 16. There are no exams here either; at the end an optional electronic assessment of pupils' work is possible. 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 →National programme
The state school programme of the country the school stands in: it is set by that country's ministry of education, which also licenses the school and awards the leaving certificate. That certificate is used for entry to local universities, and abroad it is matched to the local one.
What this means for this school. This entry does not count towards the score, and that is deliberate. Every lawful school in a country works to the national programme, so on its own it tells one school apart from no other - unlike the French, German or Russian programmes, which are carried abroad and confirmed by the register of their organisation. We show it because a parent needs to know what programme their child is taught and what certificate the child will get. Counting it would lift the whole ranking at once and still tell nobody apart.
Inspiredschool network
Inspired Education Group is a private school group founded in 2013. The group gives different figures on its own pages - 125 schools on some, "more than 100" on others - and we quote both: choosing for a group which of its own numbers is correct is not something we do. Its schools are in Europe, Latin America, Africa, the Middle East and Southeast Asia, and some of them keep their own historic names, such as King's College in Madrid and Riga. The group's site is inspirededu.com.
What this means for this school. The network owns or operates the school. Its accreditation and programme authorisation the school obtains separately, in its own name.
Exams and destinations from the school's official website
Exam results IB Diploma Programme: in the class of 2026 everyone obtained the diploma, top scores 43 and 42; in the class of 2024 22% scored 40 or more and 34% 35 or more. Panhellenic exams in the year of the latest class: one in four of all CGS candidates' marks across subjects was between 18 and 20, and 64% in Latin.
Where leavers go: Technical University of Munich · EPFL · McGill University · University of Warwick · Brown University · Loughborough University · Eindhoven University of Technology · Bocconi University · Vrije Universiteit Amsterdam · University of Bologna · Universidad Carlos III de Madrid · University of Leeds
and others, 25 universities in the school's list in allIB class of 2026: 93% entered their first-choice university, with universities in 12 countries. Lyceum class of the same year: 91% entered university, 67% their first or second choice, 57% universities in Athens.
Facilities from the school's official website
✓Swimming poolTwo heated indoor pools and a children's pool
✓Sports hallIndoor gym, climbing wall, ballet studio
✓LaboratoriesThree science and three computer laboratories
✓Theatre or assembly hallOutdoor amphitheatre, music conservatory, recording studio
✓LibraryLibrary with more than 25000 items
✓CateringDining hall with a dietitian, six canteens
✓School transportFleet of 75 school buses
·Boardingnot stated on the website
Also on site: Sports ground or field · Art studio · Makerspace
Campus: 67000 m² campus in Pallini
Clubs and activities: CGS Academia · STEM Academy · Elite Athlete Programme · CGS MUN · Architectural Design & Space · CGS Kids Triathlon · Robotics · Music Conservatory · Fencing Academy · Juventus Academy Athens · Nikos Boudouris Basketball Academy · Duke of Edinburgh International Award · Junior Achievement Greece · Global Issues Network · Hour of Code · World Scholar's Cup · Visual Arts Workshop
Teaching staff from the school's official website
·Teachers listed by namenot published
✓Teacher qualifications
✓Number of teachers238
·Students per teacher or class sizenot stated
What the listings show: In the IB Diploma Programme 90% of teachers hold at least one degree from a university abroad or a doctorate, 68% hold a master's or a doctorate; IB teachers are IBO examiners.
According to the school profile: 238 teachers, 192 administrative staff and 189 service staff. For the IB Diploma Programme the school gives a ratio of one teacher to three students; every IB student has a personal Tutor.
Safety and wellbeing from the school's official website
·CCTVnot stated on the website
·Security staffnot stated on the website
✓Access controlAn identity card must be shown at the security gate to enter the campus.
✓Nurse or medical roomThe school has a medical office.
✓CounsellorSchool psychologists department: social and emotional learning programmes for every grade, speech and occupational therapy screening of all pre-schoolers, special educators, counselling for parents.
✓Child protection policyThe SMART after-school zone has an internal child protection regulation by age; no nuts are used in the dining hall.
·Staff trainingnot stated on the website
✓Anti-bullying policyBullying is part of the social and emotional learning programme (grade five), internet safety, cyberbullying and grooming in the first year of Gymnasio.
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%)95 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 data85 Accreditation and verifiability (10%)85 Teaching staff (10%) scored on disclosed data70 Facilities (10%) scored on disclosed data95 Clubs and activities (8%) scored on disclosed data78 Value for money (6%) scored at the median70 "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 7 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