in norway this can be explained by an above oecd average time children spent on intentional pedagogical or educational activities aboveaverage contact time of teachers with children average level of teacher salaries and belowaverage estimated group size in the netherlands there were aboveaverage teacher salaries average contact time of teachers with children and small estimated group size compared to the average however these were more than offset by a significant belowaverage amount of time children spent on intentional pedagogical or educational activities figure for example because of luxembourg s high usd salaries it has by far the highest salary cost in preprimary education at usd it is over triple many countries shown in figure