Pre-primary education pupil-teacher ratio, 1975–2015 Info Edit Download | Share Twitter Facebook LinkedIn Reddit Email World Map Line Chart Bar Chart Tree Map Rank List Calc Table Data Table monochromatic color scheme monochromatic color scheme monochromatic-reversed color scheme triad color scheme triad-reversed color scheme complementary color scheme complementary-reversed color scheme Number of pupils enrolled in pre-primary school divided by the number of pre-primary school teachers. Source: UN