Last checked, it is the most popular TED talk ever. Even years old (it is from 2006), still relevant.
Check all of his talks—http://www.ted.com/talks/ken_robinson_says_schools_kill_creativity http://www.ted.com/speakers/sir_ken_robinson
He keynoted at Educase in Anaheim, CA late last year. It was speciifcally not recorded (sad). Overview—http://www.lib.uts.edu.au/blog/university-librarian/2013/11/highlights-educause-2013-1-ken-robinsons-opening-keynote
Yes, it is. And for good reason!