Here.
Schooling appears to cause specific maturational changes in children’s brains, especially math schooling. Tests of subsistence farmers show that the more schooling they have, the better their brains work on tests or neural imaging. Math curriculum demands have risen over the 20th Century. Conclusion: Increased education, especially in math, may be partly responsible for the Flynn Effect.
Amazing article. Could improved education be driving Flynn changes in IQ in the modern era? Education, especially in math (Why math?) actually improves your brain on a physical level. Incredible.