The International School of Kenya (ISK)Â is one of the priciest schools in Kenya and has elementary, middle and high schools and over 900 students from over 60 countries.
For a pre-kindergarten level, one parts with Sh. 1.57 million in annual fee, besides other charges, while high school costs Sh. 3.01 million in tuition alone.
It was started by an American, Nancy Ellen Crooks, near Nairobi Hospital in 1967. At the time, it was an American mixed community school.
ISK catered for the education of expatriate children, but in 1970, the United States International University (USIU) bought and renamed it Nairobi International School and relocated it to a 50-acre land in the leafy Kitisuru area
— and renamed the  International School of Kenya six years later after a joint partnership between the   Canadian and US governments.
Notable alumni of ISK include the Ehsani siblings, whose family own the Village Market in Nairobi and the Tribe Hotel, where Hooman Ehsani is Hotel director and Shamim Ehsani is the hotel’s marketing director while Soha Ehsani runs Century City Property Ltd.
Others who went through the American curriculum include Kenya Nut Company MD Mbugua Ngugi,  son of billionaire Pius Ngugi of Thika Coffee Mills and Morendat Farm; musician Jason Sibi-Okumu of The Lonely Streets of Boston and son of veteran actor, journalist and teacher John Sibi-Okumu; Java coffee chain’s founder John Wagner; Rand Merchant Bank Corporate Finance Transactor Sharon Koimett; and Walker Kontos Advocates associate, Fahreen Alibhai.
