Many say it's the diet of fish and berries. Wall Street Journal disagrees, offering another PISA-inspired look at the Finnish school system. There are some funny bits:
Teens sift by style, including "fruittari," or preppies; "hoppari," or hip-hop, or the confounding "fruittari-hoppari," which fuses both. Ask an obvious question and you may hear "KVG," short for "Check it on Google, you idiot."
(If you don't know the lingo, fucking google it, fruitcake.)
The reporter also notes that young school children tend to travel to school on their own, classes still have overhead projectors, and, shockingly, there are no marching bands. It's a strange, strange world out there.