 CAISL operates as a dual American and International Baccalaureate (IB) program and is one of Portugal's most expensive schools.CAISL's student population is largely international, with most students connected to diplomatic missions and embassies in Lisbon, followed by Portuguese nationals, and a sizable minority of Americans.CAISL has numerous partnerships with institutions, such as the prestigious Gulbenkian Foundation, to support research initiatives into teaching methods, philanthropic outreach, and to host international conferences and cultural exhibitions.