The war in Syria is creating a generation of damaged children, aUN report warns.
School-age refugees who have fled to neighbouring countries are increasingly cut off from education and forced to work to survive, the study found.
As many as 300,000 living in Lebanon and Jordan could be without schooling by the end of 2013, the UNHCR says.
Many of those not at school go out to work for long hours and for low pay from as young as seven years old.
More than half of 2.2 million Syrian refugees are children, the UN says, with many facing grave dangers even outside the war zone.
Those perils include threats to their physical and psychological well-being, according to the report's authors.