This is extremely shortsighted. Educated people are a lot harder to exploit. One of these students might one day lead the kind of change we’ve seen in numerous examples through history.
If you're trying to talk someone into something, sure. But if all you really mean to do is get someone's compliance where you want it and silence otherwise, I would think a realistic threat of thuggery trumps education an overwhelming majority of the time. I also wouldn't be surprised if education was limited to those that were considered "reliable", with vested interests in perpetuating the system.
Giving power without changing values is helping the worst kind of people to be stronger. It can fireback and it does. The worst censorship practices of China are now trying ot make it's way to the West.
I would recommend that you educate yourself on what North Korea actually is and how deeply oppressive it is.
Anyone in North Korea who has access to a computer is in the highest caste in their system. You are born into this caste, and it's based on the interviews that were done of North Korean people in the 1950s. Families were classified into hostile, wavering, or supporters of the communist revolution. These classifications were made primarily on the basis of occupation and other factors that were indicators of whether they were in a higher economic class or were more of a proletariat.
In short the only people who are going to learn anything about software North Korea are part of the class that is oppressing most of the nation. Another thing that you certainly aren't aware of is the fact that people in the lowest caste are literally prevented from traveling into any of the North Korean cities and are relegated to a portion in the Northeast and aren't even allowed to be anywhere near a border where they could potentially escape into China or SK.
Stating that something is shortsighted should be based on some knowledge of the nation you are talking about.