Underprevileged Pakistani children study in an open space at...

ISLAMABAD, PAKISTAN - 2014/04/22: Underprevileged Pakistani children study in an open space at a park turned makeshift school in the centre of the Pakistani capital Islamabad. Master (teacher) Ayub Khan, who is a civil servant, had voluntarily started this noble cause and iniitiated this makeshift school for the streets or poverty-stricken children during the past 25 years where every evening more than 150 children gather to get education at this make-shift school. Pakistan has almost 5.5 million children that are out of school, the second highest number in the world only after Nigeria. Pakistan also has the highest number of illiterate adults in the world, after India and China. (Photo by M.Nadeem/Pacific Press/LightRocket via Getty Images)