"Learning is available at the library for free; under a tree with a dog-eared paperback; at a job with a boss who gives you responsibility and mentorship; while traveling; while leading a cause, movement, or charity; while writing a novel or composing a poem or crafting a song; while interning, apprenticing, or volunteering; while playing a sport or immersing yourself in a language; while starting a business; and now, while watching a TED talk or taking a Khan Academy class."