New research shows that teaching kids more and more, at ever-younger ages, may backfire.

"Adults often assume that most learning is the result of teaching and that exploratory, spontaneous learning is unusual. But actually, spontaneous learning is more fundamental. It's this kind of learning, in fact, that allows kids to learn from teachers in the first place."

[...] "Knowing this, it's more important than ever to give children's remarkable, spontaneous learning abilities free rein. That means a rich, stable, and safe world, with affectionate and supportive grown-ups, and lots of opportunities for exploration and play."

http://www.slate.com/articles/double_x/doublex/2011/03/why_preschool_shouldnt_be_like_school.html