Elessar:
I think that's a good point... Today's education system is so totally inefficient time-wise.
I agree but I also think that after going through the trauma of a WWIII that the world government would have emphasized the subject areas that would have rejuvenated and rebuilt the planet ASAP. This would have meant the sciences. Government emphasis on the sciences in school may have forced the compressed what we consider today's normal school curriculum into shorter time periods.
What I mean is that the school curriculum for grades 1-3 may be done in a year or 1.5 years of school so that by the time of the last two years of high school, maybe they're doing the first 2-3 years of undergraduate degree work. College then becomes specialization into specific scientific/technical areas of study.