The British International School Istanbul (BISI) is a private international primary and secondary school in Istanbul, Turkey, offering a modified English National Curriculum, IGCSE and the International Baccalaureate Diploma Programme. The school comprises two campuses: a city campus for preschool and primary students and a campus in Zekeriyaköy for preschool, primary, and secondary students. The school is a co-educational community. Students come from over 55 nationalities and are between the ages of 2½ to 18 years old. As a private international school, graduates often go on to gain university educations. Alum frequently enrol in higher education institutions in the UK and USA.