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Oeiras International School

Portugal, Lisbon

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Language Provision

Language learning opportunities and multilingual education

Language Provision

Portuguese and English are core languages; they are taught as first language or Language and Literature in IB terms. German, French, Spanish and Mandarin Chinese are offered as first language and for language acquisition. Most students study three languages, with the level of study matched to fluency rather than age. In the MYP, language acquisition is taught for 3 lessons per week.

Bilingual Teaching

Portuguese and English are core languages; in IB terms they are Language and Literature or first language. German, French, Spanish and Mandarin Chinese are offered as first language and for language acquisition. Most students study three languages.

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The school at a glance
Instructs in English
Fees €14,962 - 24,844
Ages 6 - 18 years
Pupil numbers 463
Type Co-educational
Opened 2010
Bus Service Yes

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.

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