We may take as our guide here John Dewey’s observation that the content of a lesson is the least important thing about learning. As he wrote in Experience and Education: “Perhaps the greatest of all pedagogical fallacies is the notion that a person learns only what he is studying at the time. Collateral learning in the way of formation of enduring attitudes… may be and often is more important than the spelling lesson or lesson in geography or history… For these attitudes are fundamentally what count in the future.” In other words, the most important thing one learns is always something about how one learns. As Dewey wrote in another place, we learn what we do.
~Neil Postman, Amusing Ourselves to Death