[2] OIS is a fully accredited independent international day school for students from 3 to 19 years of age (pre-school to IB Diploma).

The last two years of the upper secondary are authorised as a world school by the International Baccalaureate Organisation.

OIS is located in modern, architecturally unique facilities in a green suburban neighbourhood and is close to Bekkestua, which is a public transportation hub.

The school offers lessons taught in various different subjects, including mathematics, literacy, arts, science and social studies.

[3] The school has multiple facilities including a multipurpose hall, sports fields, an indoor courtyard, a library and a laboratory.