Please help me check my Task 1 essay.

The bar chart shows the average size class in primary schools and lower secondary schools in 6 countries compared to the world average in 2006.

The bar chart compares the average number of students in an average class of primary schools and lower secondary schools in six different nations and the world in the year 2006.
Overall, the size of the class of lower secondary schools was mostly larger than that of elementary schools. Additionally, a class in Asia countries had more students than other nations, above the average of the world.
In terms of Elementary schools, South Korea has the largest size of a classroom, with 34 students per class. Following were Japan and the UK, with 29 and 27 students respectively. The figures for these three countries were a little higher than the world average, which was 25 students. Mexico’s and Iceland’s sizes of the class were smaller, with 20 and 21 students in a class.
South Korea and Japan held the highest number of student in a class of Lower Secondary schools, having 36 and 34 students respectively. Despite the small size of the class in Primary schools, Mexico had 30 students in a class, one of the three nations having a higher figure compared to the world average. In contrast, although the UK’s size of the class in Elementary was quite large, the figure for Lower Secondary one was only 17 students. Similarly, Denmark’s and Iceland’s average class had approximately 20 students.