From a paper on high tech worker stagnation I found this little chart on tertiary education that probably helps explain some aspects of the Korean generation gap.
Similar data is presented here, albeit in individual graphs. The various shapes represent age demographics within the country and the line length is a measurement of the difference. The delta (the largest one there) between the generations in Korea is a good measure of the education divide. Of course 55-64 years ago Korea wasn't the same as it is now:
33% of primary schools destroyed, 60% of classrooms unusable, 80% of books and equipment lost, 38% of teachers missing, 25% of upper secondary schools demolished, 20% teaching staff missing. Such was the situation of Korea’s education system in 1952.