Zurich International School is a non-profit day school with two campuses in the Greater Zurich area: Wädenswil for early childhood to Grade 5, and Adliswil for Grades 6 to 12. Around 1,300 students aged 3 to 18 attend, from more than 60 nationalities. Roughly 400 are in the primary years, 340 in the middle school and 540 in the high school. Teaching is in English, with a bilingual English-German pathway that starts at age 3 and extends to Grade 9. In the final years students take the International Baccalaureate (IB) Diploma Programme or Advanced Placement courses. The school is accredited by the New England Association of Schools and Colleges.