I just recieved word from the TEDx people that the TEDxPlymouth event has been approved and they have doubled the standard capacity to 200 people because of the location and educational setting (Plymouth South High School)
The potential to use TED Talks in the classroom is inspiring...here is a short list of TED Talks that could be used in the history classroom...this is a very short list, explore more on your own.
HERE is the TED Talks page that lists all of the tag terms used for their talks.
The True Face of Leonardo daVinci - Siegfried Woldhek
Lessons from the 1918 Flu - Laurie Garrett
Sputnik Mania - David Hoffman
Learning from Past Presidents - Doris Kearns Goodwin
Surviving a Nuclear Attack - Irwin Redlener
Why Societies Collapse - Jared Diamond
News about the News - Alisa Miller
New Insights on Poverty - Hans Rosling (Amazing Graphing)
New Family Tree / Genome Project - Spencer Wells