International School of Zanzibar International School of Zanzibar The International School of Zanzibar (founded in 1988) is a private international school located on the island of Zanzibar, Tanzania. It hosts students from over 20 countries, ages 2–16, from pre-kindergarten, to Year 12. The official language, and language of instruction of this school, is English. The academic program is based on the Cambridge International General Certificate of Secondary Education, the IGCSE. Currently, there are about 200 students enrolled in the school, from many different countries. The International School of Zanzibar (ISZ) was founded by parents from foreign countries as a play area for their children.
History of Zanzibar visit in 1499 marked the beginning of European influence. In 1503 or 1504, Zanzibar became part of the Portuguese Empire when Captain Ruy Lourenço Ravasco Marques landed and demanded and received tribute from the sultan in exchange for peace. Zanzibar remained a possession of Portugal for almost two centuries. In 1698, Zanzibar became part of the overseas holdings of Oman, falling under the control of the Sultan of Oman. The Portuguese were expelled and a lucrative trade in slaves and ivory thrived, along with an expanding plantation economy centring on cloves. With an excellent harbor and no shortage of fresh