The pie charts illustrate the class sizes in primary schools in four Australian states in 2010.
In general, while the most popular size of classes was 25-30 students in almost all regions examined, except for South Australia, classes having less than 20 members accounted for the least proportion across four areas examined. Additionally, the other two class sizes experienced great fluctuations in rankings.
It is noticeable that the 25-30 learners category was the most common size of classes in three out of four areas reported. In Australia Capital Territory, the figure for this group contributed more than half of the class sizes. Similarly, this dominance was also witnessed in Western Australia and New South Wales, registering 42% and 37%, respectively. Although the 25-30 participants category made up one-third of the class sizes in South Australia, it was not the most popular. In addition, classes having under 20 learners accounted for a tiny minority across four regions examined, with less than or equal to 5%.
Great variations in rankings were seen in the data for the other two class sizes. In New South Wales and Western Australia, the more than 30 students group ranked second, registering 33% and 27% respectively, which exceeded the figure for the 21-25 members class size, with 26%. The 21-25 participants category accounted for a greater proportion than the more than 30 learners class size in Australia Capital Territory, with 38% and 10%, respectively. However, the 21-25 students group was the most common class size, contributing 35% in South Australia. In this region, classes having more than 30 participants came in third place, with 28%.