John Hunter puts all the problems of the world on a 4'x5' plywood board -- and lets his 4th-graders solve them. At TED2011, he explains how his World Peace Game engages schoolkids, and why the complex lessons it teaches -- spontaneous, and always surprising -- go further than classroom lectures can.

We all have thoughts in our heads. Our self-image, our perception of ourselves, is shaped by these thoughts. In this TEDx Talk, Jean Hendry asks you to consider changing your perspective and bring in a roommate to combat the monologue in your head. It is the very best thing you could ever do for yourself. Turn your self-doubt into recognizing a...

Hendrik-Jan Grievink is researcher and designer at Next Nature Network and in that position responsible for much of the visual output of the network. He co-edited and designed the award-winning In Vitro Meat Cookbook that explores the future of lab grown meat through 45 speculative recipes and invented the Pyramid of Technology, a conceptual mod...