Costeas-Geitonas School CGS

"Costeas-Geitonas School, widely known as CGS, is a well-established private institution located in Pallini, in the Attica region approximately 30 minutes outside the heart of Athens."

Serving students from kindergarten through high school, CGS has built a reputation as one of Greece's leading private schools, offering a rigorous academic environment within a warm and close-knit community. The school operates as a day school, running from 8:30 to 15:00, and draws families from across the greater Athens area, including the many international and expatriate communities that call the Greek capital home. Founded in the early 1970s, CGS has decades of experience shaping young learners and has grown steadily over the years to meet the evolving needs of both local Greek families and internationally mobile professionals seeking a high-quality, globally recognized education for their children. That long institutional history brings with it a sense of stability and established tradition that many relocating families find reassuring. One of the school's most defining features is its full commitment to the International Baccalaureate framework. CGS offers all three core IB programmes — the Primary Years Programme (PYP) for younger students, the Middle Years Programme (MYP) for the intermediate grades, and the Diploma Programme (DP) at the senior secondary level. This seamless continuum means that a child can enter CGS in the early years and follow a coherent, internationally recognized educational pathway all the way through to university entrance. The IB's emphasis on inquiry-based learning, intercultural understanding, and independent thinking makes CGS particularly well suited to students who may eventually pursue higher education abroad or who have already experienced international schooling in other countries. Language sits at the center of the CGS experience. Instruction is delivered in both English and Modern Greek, reflecting the school's dual identity as an institution that honors Greek language and culture while simultaneously preparing students for an international world. This bilingual approach is a genuine asset for expatriate families hoping their children will develop meaningful Greek language skills during their time in Greece, as well as for families who want to ensure English-medium academic preparation remains strong. The campus in Pallini offers a setting that balances accessibility with a degree of separation from the urban density of central Athens. Situated in the Attica region, the school is reachable from many of the residential neighborhoods favored by expatriate and professional families, and the surrounding area provides a more spacious environment than a city-center location typically allows. For families evaluating options in the Athens area, CGS presents a compelling combination: a long-standing institution with deep roots in the Greek educational landscape, a full IB continuum recognized by universities worldwide, genuine bilingual instruction in English and Greek, and a day school structure that supports family life. Whether a family is relocating to Greece for a defined posting or settling more permanently, Costeas-Geitonas School offers the academic credibility and international orientation to support children at every stage of their schooling journey.