Inside Pakistan's school without teachers
29 January 2014 Last updated at 10:02 GMT
It will be more than 70 years before all children have access to primary school, a report from the United Nations Educational, Scientific and Cultural Organization says.
In Pakistan, fewer than a third of children are learning the basics in reading and maths.
Aleem Maqbool reports from a school in Sindh province, in the south-east of the country, where there are no teachers and buildings are empty - but still receives government funding for teachers.