The four pie graphs compare the proportions of four distinct cases in classrooms of primary schools in Australia in 2010.
Overall, the percentages of 21–25 students in schools in all Australian areas were the most popular, except for South Australia, where 20 students or fewer were most popular. Another interesting difference is that classes in primary schools with 30 students were preferred at significantly lower rates in four states.
In terms of New South Wales, the main proportion of classes included 21–25 students, with 37% in that range, and 26–30 students were a secondary popular size with 33% as well. In primary schools in New South Wales, classes with 20 students or fewer comprised 26% of classes, while classes with 30 students or more were a mere 4%. Likewise, 66% of classes in South Australia included 20 to 25 students, whereas a considerably higher rate (28%) was found for classes with 26–30 students than for classes with 30 students or more (4%).
By contrast, primary schools in the Australian Capital Territory had 51% of classes with 21–25 students in 2010, and this territory also had a high percentage of classes with 20 students or fewer (38%). The percentage of classes in primary schools in the Australian Capital Territory with 26–30 students and 30 students or more was 10% and only 1%, respectively. Similarly, the main size of classrooms in Western Australia included 21–25 students, with 42%, whereas there were 27% of classes with 26–30 students and 26% of classes with 20 students.