The International School of Zanzibar aims to provide a first rate education for all. Making sure that every child can progress and achieve their potential The School The International School of Zanzibar (ISZ) is a co-educational independent day school. The school is accredited by the University of Cambridge as an international exam centre, which gives us the right to teach and examine IGCSEs and A levels. The Students ISZ is proud of its International student body enrolling just under 160 students throughout the age ranges, representing 29 different countries. These include Tanzanian (46%), Germany (7%), the United Kingdom (6%), Italian (5%), Egyptian (4%), Finnish (3%), and Spanish (3%). The remaining 27% of the student population come from 22 other nations.