After failing to learn French during five years of school, Sanjoy Mahajan taught himself the language in three months:
If we learned our first language like we usually learn second languages, it might look like this. A young child says, "I am hungry." The parent replies, "Wait! Before saying am, you first must learn to conjugate to be in all persons and number, in the indicative, imperative, and subjunctive moods, and in the past, perfect, and future tenses." After a few months, or maybe weeks, of this teaching, the child would conclude that it has no aptitude for languages and become mute. And human culture would perish in a generation.
Allison Gopnik is also skeptical of formal schooling:
The traditional way of thinking about learning at a university is: there’s somebody who’s a teacher, who actually has some amount of knowledge, and their job is figuring out a way of communicating that knowledge. That’s literally a medieval model; it comes from the days when there weren’t a lot of printed books around, so someone read the book and explained it to everybody else. That’s our model for what university education, and for that matter high school education, ought to be like. It’s not a model that anybody’s ever found any independent evidence for.
The Dish 