Gaza’s children return to school

But they are facing extra challenges this year, including overcrowded classrooms

There are also shortages of stationary and other school supplies

It is the third year that students will attend classes under an Israeli-imposed siege

Because of the shortages, pupils have been exempted from wearing uniforms this semester

Nearly 300 schools were damaged or destroyed during Israel's war on the territory last December and January

Many UN schools were converted into refugee shelters during the war

None of those schools have been properly rebuilt or repaired, according to the UN

But despite the difficulties, many of the students remain upbeat and eager to learn