The pie charts illustrate the proportions of class sizes in primary schools across four Australian states—New South Wales, South Australia, the Australian Capital Territory, and Western Australia—in 2010.
Overall, the most common class size across all four regions was 21-25 students, while classes with 30 or more students represented the smallest proportion in each state.
Looking at the data in more detail, the Australian Capital Territory had the highest proportion of classes with 21-25 students, at 51%, which was notably higher than Western Australia, where this group accounted for 42%. In contrast, New South Wales had 37% of classes within this range, slightly more than South Australia, which stood at 33%.
In terms of the smallest class sizes (20 students or fewer), New South Wales and Western Australia both recorded the same figure of 26%, which was significantly lower than the Australian Capital Territory and South Australia, where these classes accounted for 38% and 36%, respectively.
On the other hand, classes with 26-30 students represented only 4% of the total in both New South Wales and South Australia, a proportion that was four times higher than in the Australian Capital Territory (1%). Finally, when examining the largest class size (30 students or more), New South Wales had the highest proportion at 33%, followed by South Australia (28%), Western Australia (27%), and the Australian Capital Territory (10%).