OKI was the first International school to be opened in Wattala, which was in year 1998, since then the school, has grown in leaps and bounds. Now with 6 branches located in Wattala, Kaduwela, Kiribathgoda, Negombo, Kandana and Biyagama with over 5000 students, 500 hundred qualified teachers in the network. The schools cater to the English Medium in the Cambridge and National Curriculum. Students are educated in the Cambridge and National syllabus with the focus on Mathematics, English Language, Science, Commerce and Aesthetic to proudly produce World Class Citizens.