Did You Know?  Shift Happens
This presentation originally started out as a PowerPoint presentation for a faculty  meeting in August 2006 at Arapahoe High School in Centennial, Colorado, United States. The presentation "went viral" on the Web in February 2007 and, as of June 2007, had been seen by at least 5 million online viewers.
 
(Excerpt from ShiftHappens)