Welcome to OIS

An English medium IB-International Baccalaureate World School in Oeiras, Portugal, authorized for the IB Middle Years Programme (IB-MYP) and the IB Diploma Programme (IB-DP) where students will progressively become more responsible for their learning process. Starting in Year 6 (10 years of age) up to Year 13.

OIS holds official recognition from the following entities: