DEIR AL-BALAH, Gaza Strip (AP) — Bissan Younis looked dejected as she stood outside a cluster of tents surrounded by rubble and debris, a wasteland that is a common sight across the Gaza Strip . The tiny encampment was yet another makeshift school that has no room for her teenage son Kareem. “Most of the schools are destroyed,” she told The Associated Press. “Every school I go to tells me there is no room.” More than 600,000 Palestinian children in Gaza have missed the past two years of school