How does anyone learn? We truly learn what we are engaged by and have opportunity to explore further.
As my daughter, a junior in High school, recently said to me, "Study doesn't mean learn, it means to memorize." (She voiced her frustration with teacher expectations and realizes that just because a teacher tells students to study something, doesn't necessarily result in actual learning.)
She has learned a great deal this year and most of her learning has not occurred in the classroom. I look no further than my own three children (16, 17 and 22) and know that they are well on their way to becoming life-long learners because there is much that engages them and what they have created to demonstrate what they have learned is impressive. Most of that learning has occurred as a result of their use of the Web 2.0. It is so natural to them, as natural as learning to speak English.