The given bar chart illustrates how the number of students per class in primary school and lower secondary school in six different countries compared to the world average in 2006.
Overall, the number of pupils in South Korea and Japan in both types of school were higher than that of world average, while the opposite was true for Denmark and Iceland. In addition, the gap between the number of elementary students and middle school students in the UK and Mexico was the largest among six countries.
In South Korea, the number of primary school students was the highest at 34 students, while the figure for lower secondary school was 36. That of Japan was also higher than the world average but still lower than South Korea, with 29 students in primary and 34 in secondary. The average class size in Denmark and Iceland recorded a similar pattern and both were below the global average, with roughly 22 pupils in elementary school and 20 in secondary school.
Regarding the UK, the number of students in primary school in this country was nearly 28, making the large gap with that of lower secondary school at 18. In contrast, the number of elementary school students in Mexico was exactly 20 pupils, which is 10 pupils lower than the figure for secondary school.