Lyceum is a fully fledged K-12 school and the largest international school in Sri Lanka, providing a variety of subject choices and extra-curricular activities. Situated in the heart of Nugegoda, Lyceum has spread its wings and has branch schools in Gampaha, Kandana, Panadura, Ratnapura and Wattala.

Lyceum International School which provides a world-class education under a programme designed to preserve national identity and social norms of this country has produced many students who have scored highest marks in the world, at the Edexcel and Cambride ‘O’ Level and ‘A’ Level Examinations. At the Edexcel AL Examination in May 2007 Lyceum won the highest number of world awards which were all for Accounts. At the Cambridge O/L Examinations in 2007 and 2008 Lyceum students have won World Awards for Biology and English Literature.