The pie chart provides information about variations in the dimensions of classes in primary schools in four states in 2010.
Overall, classes with 21–25 students accounted for the largest portion in all four areas surveyed, except in South Australia, where the highest percentage was obtained from 20 students or fewer. Classes with 30 students or more were reported with the lowest proportion in all four places.
Looking first at less than or equal to 20 students, 26% of classes in New South Wales had that number, while the figure for South Australia was 10% higher, at 36%, followed by that of the Australian Capital Territory and Western Australia, with 38% and 26%, respectively. Classes consisting of 21–25 students made up just over half of the proportion in that area, at 51%, compared to New South Wales with 37% and Western Australia with 42%. That size of class received the lowest rate in South Australia, with 33%.
Turning to the remaining class size, classes with 26–30 students were the second rarest category in Australia Capital Territory with only 10%, but they were among the most popular ones in New South Wales, South Australia, and Western Australia, at 33%, 28%, and 27%, respectively. Finally, below 5% of primary classes having equal or more than 30 students were surveyed in each country, making it the least famous class size in this study.