I would say I have seen evidence of this in post-secondary classrooms. In the past, teachers were viewed as the holder of wisdom/information. A better definition of teaching is perhaps the guide at your side, and not the sage on the stage. Especially in adult classrooms, a teacher can expect that student knowledge will contribute to the learning that happens. But new media technologies have really changed the class environment at many levels. Students can go to Google, YouTube, Twitter, etc. and bring new, up-to-the minute news and information on almost any subject to the discussion. I have stopped on more than one occasion to share new information that a student has sourced online. Teaching them to be critical thinkers about the information they are able to access is a lesson that needs to accompany this ability.