Shimon Schocken and Noam Nisan developed a curriculum for their students to build a computer, piece by piece. When they put the course online -- giving away the tools, simulators, chip specifications and other building blocks -- they were surprised that thousands jumped at the opportunity to learn, working independently as well as organizing their own classes in the first Massive Open Online Course (MOOC). A call to forget about grades and tap into the self-motivation to learn.

What should a community do with its unused land? Plant food, of course. With energy and humor, Pam Warhurst tells at the TEDSalon the story of how she and a growing team of volunteers came together to turn plots of unused land into communal vegetable gardens, and to change the narrative of food in their community.

Daphne Koller is enticing top universities to put their most intriguing courses online for free -- not just as a service, but as a way to research how people learn. With Coursera (cofounded by Andrew Ng), each keystroke, quiz, peer-to-peer discussion and self-graded assignment builds an unprecedented pool of data on how knowledge is processed.

A whirlwind of energy and ideas, Stephen Ritz is a teacher in New York's tough South Bronx, where he and his kids grow lush gardens for food, greenery -- and jobs. Just try to keep up with this New York treasure as he spins through the many, many ways there are to grow hope in a neighborhood many have written off, or in your own.

Bees have been rapidly and mysteriously disappearing from rural areas, with grave implications for agriculture. But bees seem to flourish in urban environments -- and cities need their help, too. Noah Wilson-Rich suggests that urban beekeeping might play a role in revitalizing both a city and a species.

브리태니커 백과사전의 절판소식에 자극받은 즉흥시인 라이브스는 자신이 어린시절에 했던 놀이 하나를 부활시킵니다. 도하 테드엑스서밋에서의 연설에서 라이브스는 우리를 인간의 지식을 무작위로 (혹은 약간 혼란스럽게) 활용하는 매혹적인 여행으로 인도합니다. 여행 중에 우린 침보라조, 지구의 중점에서 가장 멀리 떨어져 있는 지표점에서 우주 밖으로 나간 최초의 침팬지인 우주침팬지 햄을 만날 수 있습니다.

Prompted by the Encyclopaedia Britannica ending its print publication, performance poet Rives resurrects a game from his childhood. Speaking at the TEDxSummit in Doha, Rives takes us on a charming tour through random (and less random) bits of human knowledge: from Chimborazo, the farthest point from the center of the Earth, to Ham the Astrochimp, the first chimpanzee in outer space.

In the fall of 2011 Peter Norvig taught a class with Sebastian Thrun on artificial intelligence at Stanford attended by 175 students in situ -- and over 100,000 via an interactive webcast. He shares what he learned about teaching to a global classroom.

마르코 템페스트는 인류 역사상 가장 특출한 괴짜 발명가라는 평판을 가졌고, 교류 전기의 발명가라는 명예를 가졌음에도 불구하고 무일푼으로 마지막 날을 보낸 니콜라 테슬라의 흥미있는 생애를 프로젝션 매핑 기술과 팝업북을 통해 이야기해 준다.

Combining projection mapping and a pop-up book, Marco Tempest tells the visually arresting story of Nikola Tesla -- called "the greatest geek who ever lived" -- from his triumphant invention of alternating current to his penniless last days.