Welcome to OIS

OIS is an English speaking IB-International Baccalaureate World School in Oeiras, Portugal, authorized for the IB Middle Years Programme (IB-MYP), the IB Diploma Programme (IB-DP) and the IB Career-Programme (IB-CP) where students progressively become more responsible for their learning process. The program begins from Year 6 (10 years of age) up to Year 13.

OIS is officially recognized by the following entities: