More than 200,000 children in Syria had no schools to go to on the first day of classes on Monday Al Jazeera reported
The UN says more than 2,000 schools have been damaged or destroyed since the beginning of an uprising against the government in March last year.
Other educational buildings are being used as shelters by families displaced by the fighting.
According to UN, the total number of victims of the conflict in Syria is nearing 20,000. More than 230,000 have become refugees with around three million in need of humanitarian assistance. The Syrian authorities say they oppose the well-armed militants.