http://gulfnews.com/news/region/palestinian-territories/overcrowded-scho...

You can read there how Israel is responsible for all the bad that happens in Gaza, including the fact that they spend all the time buying weapons rather than work and get the money to build new schools.

Then, at the end of the text, incidentally, you can read:

"Even if I have to eat once every three days, I will do everything within my power to educate my children," Nehad Judeh, a father of ten told Gulf News.

Maybe having families of ten children makes it difficult to build so many schools to educate them, without having to blame Israel for it... Just an idea!