The number of hours teachers are formally required to teach.
A teacher of general subjects in upper secondary education has an average teaching load of 664 hours per year. Teaching time exceeds 800 hours in only six countries: Argentina, Australia, Chile, Mexico, Scotland and the United States. In contrast, teachers are required to teach less than 500 hours per year in Denmark, Greece and the Russian Federation. Teachers in Denmark, Finland, Greece, Israel, Japan, Korea, Norway and the Russian Federation teach for three hours or less per day, on average, compared to more than five hours in Chile and the United States and up to eight hours in Argentina. Including breaks between classes in teaching time in some countries, but not in others, may explain some of these differences (OECD, 2013: 397).