Source:
BBCAbout 200,000 Palestinian children were expected to return to class.
In the later stages of the three-week conflict, many of the schools were used to shelter Palestinians whose homes were damaged or destroyed.
It follows a decision by Israel on Friday to lift a ban on UN and foreign aid workers entering the Gaza Strip.
The ban had been in place since early November when tensions mounted between Israel and Hamas as the end of a six-month ceasefire approached.
Read more:
http://news.bbc.co.uk/2/hi/middle_east/7848643.stm
The schools are in tents amid the wreckage. There is a video at the link worth seeing.