‘The Voyager’, ACS’s annual school magazine, was first launched in 1926 and in 1936, Mr. P.B. Bell launched the construction the first science laboratory among Perak schools. The new block, also consisting of a carpentry workshop, was officially opened in 1938.

With the onset of the Pacific War, the British Army requisitioned the front portion of the school as their Ipoh headquarters. When the British troops withdrew in 1941, the school was taken over by the Japanese until their defeat in 1945. The school reopened its doors on the 26th of September 1945 under the first local principal, Mr. Aw Boon Jin.

In the decade that followed, the curriculum was expanded to include various languages, more science subjects and woodwork up to School Certificate Level. In 1949, ACS was the first school in Perak to offer post-Senior classes, the equivalent of today’s Form 6. In 1956, Mr. Teetath Ram took over the administration of the school. He was a visionary leader who instigated many changes including the separation of the primary and secondary sections of the school, the construction of several new blocks housing classrooms, a teachers’ lounge, a lecture theatre, an improved library and a new canteen. He was also responsible for the construction of the recreation centre and the swimming pool – the pride of the school of which the school teachers contributed $32 000 of the $140 000 building cost – as well as the $250 000 indoor stadium, named “Teetath Ram Hall” in his honour.

Several upgrades to the school were undertaken in subsequent years, including the building of an Audio Visual Aids (AVA) Room, the setting up of the School Band, and under Principal Thomas Kok Hee Fatt, the modernising of the school saw the set up a Computer Room and four additional AVA rooms. He saw the significance of sports and of creating a comfortable and pleasant environment in which the students could excel, doing his part to make the school greener. He also introduced the Eagle as the school mascot in 1999.

ACS has in its alumni several prolific sportsmen including the badminton players Mr. Teoh Seng Khoon (Thomas Cup 1949 and All-England 1949) and Mr. Cheah Soon Kit (Thomas Cup 1992); Malaysian Olympic representatives Professor Thong Saw Pak (weightlifting, Helsinki 1952), Mr. Philip Sankey (hockey, Melbourne 1956 and Tokyo 1964), Mr. Chet Singh a/l Sarmukh Singh (hockey, Tokyo 1964) and Dato Poon Fook Loke (hockey captain, Montreal 1976 and Los Angeles 1984). The school also produced top national swimmers Allan Ong and Anthony Ang.”