Based on the British system, students of the Senior School, in Grades 9 and 10, follow syllabuses laid down in a range of subjects by Cambridge International Examinations, preparing them for International General Certificate of Secondary Education (IGCSE) examinations, and by the University of London, preparing for O Levels.[citation needed] The IGCSE is the international equivalent of GCSE examinations taken by students in schools in England and Wales at age 16 and above. These examinations are set, moderated and marked by the examining boards of the universities.