United Nations estimates between 6,000-12,000 bodies are contained in the 202 graves documented in the report
Much of Mosul in ruins, thousands dead and wounded and nearly half the city's population forced from their homes
Oil-rich Iraq historically had very high literacy rates and primary school enrollment was 100% in the 1980s
End of the battle for Mosul will also leave Iraq struggling with thorny political issues
Like many buildings in Mosul, the school bears the signs of warfare
Khamis Khanjar said at least 3,500 civilians have been killed since the push into the western side last month
Reporter killed by explosive device near on a roadside
TV footage showed young men holding Iraqi flags and covering their faces, running away as smoke filled Tahrir Square
Mosul lies on the Tigris River at a crossroads between Iraq, Turkey and Syria and once prospered as a major trade hub
Yazidis were killed and taken captive by the hardline militants, who regard the Yazidis' faith as devil-worship