The given chart illustrates how much time a teacher spent at primary, lower secondary, and upper secondary school in 4 different countries during 2001.
Overall, teachers in the USA used to teach significantly more than 3 remaining countries. Furthermore, teachers in upper secondary school worked more hours than other teachers.
In 2001, both teachers in Japan and Spain taught around 600 hours per year. In addition, Japanese teachers in upper secondary school also only taught for over 600 hours, while the figure for those in Spain was much higher, extending nearly 1000 hours teaching per year.
Turning to 2 other countries, the time primary school teachers spent in Iceland and the USA was 600 hours and about 850 hours per year respectively. Teachers in Ireland spent 800 hours teaching lower secondary while the number for upper secondary school was minimally smaller, at about 790 hours. However, US educators spent more time for upper than lower education, which was 1100 hours and 1000 hours respectively.