"Opening" schools is a meaningless statistic. It is very easy to build, staff1, have a ceremony dedicating, and open a school that no student will ever attend. There are hundreds, if not thousands, of such schools across the globe - and in the glossy brochures of multi-national corporations and NGO yearly reports.
When I assess a conflict, I always look for children walking to and from school. If they are unaccompanied by an adult, the security situation is usually pretty good. If there are no children on the streets, then I know the security situation is rotten. If parents are walking kids to school, security in general is not good, but certain hours are safer than others.
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1 Well, actually it is really, really hard to adequately staff schools - especially if you are trying to open more than one. Teachers don't grow on trees; a lot of resources go into building a teacher.
Posted by Martial