Challenge Based Learning

Continuing on with the theme this week of 21st Century writing/literacy/teaching, I am intrigued by the idea of challenge based learning.  In a nutshell,

Challenge Based Learning is an engaging multidisciplinary approach to teaching and
learning that encourages students to leverage the technology they use in their daily
lives to solve real-world problems. Challenge Based Learning is collaborative and handson, asking students to work with peers, teachers, and experts in their communities and around the world to ask good questions, develop deeper subject area knowledge,
accept and solve challenges, take action, and share their experience.

Part of a larger collaborative effort by Apple, the sample challenges described here seem to get at the heart of what we need in education: relevance, collaboration, communication. So - how do we start making learning more challenge based and less textbook based?