This is probably just to make it look like they do learn stuff on computers, but the level of poverty in NK is so appalling I doubt they have computers in most schools.
Oh, most people in NK never get a sniff of a computer. But it has some animation and IT-outsourcing businesses which are no doubt a nice little foreign-currency earner for the government:
http://www.koreaittimes.com/story/8242/north-korea-needs-set...
http://content.time.com/time/world/article/0,8599,1906219,00...
http://cacm.acm.org/magazines/2012/8/153816-inside-the-hermi... (A¢M paywalled)