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Portugal, Lisbon
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The school uniform is required for all students in Years 2 to 11. Everyday uniform for Years 2-11 includes grey trousers or skirt, white polo shirt, grey socks or tights, all black shoes, a light blue jumper, a grey hoodie, a blue fleece, and outerwear as needed. The P.E. uniform, or team uniform and tracksuit, is compulsory for all sporting activities and travel to events; House T-shirts are worn only for House activities.
Healthy meals are provided daily through Origem, with vegetarian and vegan options; menus include soup, salad, a main course (meat, fish or vegetarian), fruit or dessert, and a low-sugar juice or water. Microwaves and picnic areas are available for meals brought from home, and an on‑campus coffee shop offers snacks and Portuguese treats.
On joining OIS, families are assigned to one of four Houses—Kingfisher, Phantom, João Baptista or Vulpes. There are house competitions in sport, arts and academics, with points contributing to the end‑of‑year House Trophy.
Oeiras International School (OIS, ASFL) is a not‑for‑profit association founded in 2009 by 30 parents and associates. The Board, elected by the Associates, oversees governance; the school reinvests revenue into facilities and staff as there are no owners or shareholders.
Oeiras International School (OIS) is a non-profit, parent-founded International Baccalaureate World School offering a full IB Continuum for ages 6 to 18. The curriculum spans the Primary Years Programme (PYP) for ages 6 to 10, the Middle Years Programme (MYP) for ages 11 to 16, and the Diploma Programme (DP) for ages 17 to 18. The school is housed on the Quinta de Nossa Senhora da Conceição estate in Barcarena, Oeiras, a historic 17th‑century property with riverine and woodland spaces that support hands‑on learning. Facilities include the Palace library, science labs, art and music rooms, classrooms in the Pavilion and White/Orange Building, and on‑site sports amenities such as a swimming pool, basketball court, football pitch, and a multisport pavilion. The campus also runs social projects from its garden farms and offers diverse co‑curriculars, languages, MUN, and the Duke of Edinburgh award. Students graduate ready for university admissions and global citizenship.
