Pupils typically focus on reading and writing in French in the last year of the Pre-Primary section (ages five to six), whilst continuing with spoken English. Those who complete the primary school will be bilingual by the end of the sixth year. Teaching is split equally between English and French, allowing for immersion in both languages. Specialist teachers support children with limited English or French. In September 2017, BICS will open a new primary school building, allowing it to accept an additional 100 pupils. The secondary school offers the International GCSE and A-level curriculum. BICS is recognised as a test centre of the University of Cambridge International Examinations, and a full member of the European Council of International Schools. Classes average a maximum of 25 students, but are usually smaller, particularly at secondary level with around five to 15 pupils per class at A level.