Complex sentence: The rest of the school which converted into English medium schools ended up as "Sekolah Kebangsaan" after Sarawak joined Malaysia, and in 1983 these English medium schools were once again converted into using Bahasa Malaysia as the medium of teaching.
Split into simpler sentences: The rest of the school which converted into English medium schools ended up as "Sekolah Kebangsaan" after Sarawak joined Malaysia. In 1983 these English medium schools were once again converted into using Bahasa Malaysia as the medium of teaching.