The U.N. envoy for global education is calling for a multimillion dollar fund to provide education in emergencies and is urging donors to start by providing $163 million to educate half a million Syrian children who are refugees in Lebanon.

Gordon Brown told a news conference Wednesday that it's time for decisive action to prevent millions of children from falling through the cracks and losing out on an education.

Brown, a former British prime minister, said there have been more than 10,000 attacks on schools during the past five years and 28 million boys and girls are not in school in areas of conflict and emergency.

He said the growing education crisis reaches from Iraq to Nigeria and from South Sudan to Pakistan.