SIS Swiss International School Pfäffikon-Schwyz is a private bilingual day school in Pfäffikon, on the upper shore of Lake Zürich, taking children from age four to the end of upper secondary. Its kindergarten covers ages four to five, followed by primary and secondary school and then the SIS Bilingual College. The college leads to the bilingual Swiss Matura and to the International Baccalaureate (IB) Diploma. English and German are both languages of instruction, used across the curriculum rather than taught only as subjects. Around 230 students attend. Pfäffikon is one of seven SIS campuses in Switzerland; the group also runs schools in Germany, Italy and Brazil.