It certainly seems to be the question right now. However, whether or not anyone has a solid definition may be the better question. The only truth we have is that the camps are divided and this question tends to bring out the feisty side of even the gentlest educators.
Despite this, it is a question that has to be asked, and now you can give your answer to an audience at the Whitehouse. On the Whitehouse.gov blog, there has been a call to answer this question: What does a 21st century education mean to you? Responses can be left via Twitter, Facebook, or LinkedIn. The promise is that intersting answers will be posted on future blog posts.