<http://www.thefutureschannel.com/index.php>
I first discovered The Futures Channel inside Wired magazine. At this site, they have excellent videos and activities that are targeted at math and science but help create the relevancy and authenticity necessary for active learning, particularly in project-based and problem-based learning. For example, understanding windsail design helps connect quadratic equations.  See the lesson and resources for yourself.

What do you think about this site or do you know of other sites that offer relevancy and authenticity to learning?