 Parent-Teacher Association of the school was formed on 10 July 1956.Later on 1 November 1957, the Right Reverend Tan Sri Roland Koh (the first Bishop after Diocese of West Malaysia was formed) opened more new classrooms for the primary education students.1 January 1958 saw the separation of St. Mary's into primary and secondary schools, with Mrs. Louise LaBrooy assuming the principal seat for the primary school.