to cope with an increasing numbers of pupils, in 1971 the school relocated to 51 muttiah road in colombo 2 (rivington) until finally in 1983 the school was relocated to its present address pelawatte, battaramulla. during the same year the school obtained accreditation by the international baccalaureate (ib) organisation as an ib world school offering the ib diploma programme. in 1982, the school changed its name to overseas children's school (ocs).