Rose said aid organizations should boost education in their programs.
"Only 2% of humanitarian aid is spent on education," she said in a disappointed tone.
According to the UNESCO report, an estimated 2 million children around the world were killed in armed conflict during the decade leading up to 2008. Classrooms, children and teachers are often targeted for strategic reasons.
"All too often, armed groups see the destruction of schools and the targeting of schoolchildren and teachers as a legitimate military strategy," it said. "The problem is not just that schools -- and schoolchildren -- are getting caught in the crossfire, but that the very places that should provide a safe haven for learning are viewed as prime targets."
At the deserted school in Jabal Zawiya, Abu Diyaa's video reveals rows of empty desks. The hallway is empty, with the exception of concrete rubble where he says the shelling took place.
His voice echoes loudly off desolate walls as the rubble crunches under his shoes.
"Here we are during the school hours, and there is not a single student here," he says.
Later, in the Syrian cave, the teacher steers his class away from the camera and back to schoolwork. "OK, let's recite what you learned today one more time," he calls out.
Abu Diyaa gets out of his way and then strikes up a conversation with a female teacher in the next room.
He asks her to deliver a message to the government.
"We will be victorious," she said, "and we will raise our children to be the teachers, the doctors and the engineers of tomorrow's Syria."