Training is broadly categorised into character building, service subjects and academic subjects. Service subjects give basic military knowledge up to the standard required for an infantry platoon commander. Academic subjects provide the cadet with a general education so as to enable a basic knowledge in professional subjects as well as enable cadets to clearly express themselves both verbally and in writing. In the early 1970s the service subjects to academic subjects ratio was 16:9 (64% service to 36% academic); this ratio was enhanced for technical graduates to a ratio of 83% service subjects and 27% academic subjects. Over time this ratio varied as per regular course entry or technical entry, and changed as terms were increased or decreased.