National language
Public secondary education in Malaysia is provided by National Secondary Schools ("Sekolah Menengah Kebangsaan", "SMK"). National Secondary Schools use Malay as the main medium of instruction because Malay language is the National language of Malaysia while English is a compulsory subject in all schools. Since 2003, Science and Mathematics had been taught in English, however in 2009 the government decided to revert to use Malay starting in year 2012.