Duration of pre-primary education

The duration of pre-primary education is measured in the number of grades (years).

Note: The definition of 'pre-primary' corresponds to the International Standard Classification of Education (ISCED). The reference years reflect the school year for which the data are presented. In somecountries the school year spans two calendar years (for example, from September 2010 to June 2011); in these cases, the reference year refers to the year in which the school year ended (2011 in theexample).