The given pie charts compare the proportions of class sizes across four Australian states.
Overall, most classes in all regions comprised fewer than 30 students, with the 21-25 range emerging as the predominant category. Another striking feature is that the Australian Capital Territory (ACT) consistently reported markedly smaller class sizes than its counterparts.
Beginning with the smaller cohorts, classes of fewer than 20 pupils were most common in the ACT, representing 38%, a figure approximately 3 percentage points higher than that of South Australia (SA). By contrast, the shares in New South Wales (NSW) and Western Australia (WA) were much lower, both just slightly above one quarter. With respect to classes of 21-25 learners, the ACT again overwhelmingly dominated, with just over half of its classes falling within this bracket, almost 10% above WA. Meanwhile, the other two states recorded only about one third of their classes in this range.
Turning to the larger cohorts, classes with more than 30 students were relatively uncommon across all states, accounting for merely 4-5%, though ACT registered a negligible proportion of just 1%. As for the 26-30 student range, NSW stood out at 33%, a figure more than threefold that of the ACT. In comparison, both WA and SA reported similar shares of around 28%, highlighting a regional divide between NSW and the rest.