Working backward to solve problems - Maurice Ashley

"To This Day" ... for the bullied and beautiful | Shane Koyczan

Kakenya Ntaiya: A girl who demanded school | TED

The difference between classical and operant conditioning - Peggy Andover

How to Reduce 'THAT' -- AMERICAN ENGLISH PRONUNCIATION

A guerilla gardener in South Central LA | Ron Finley

Visualizing hidden worlds inside your body - Dee Breger

How we found the giant squid | Edith Widder

The simple story of photosynthesis and food - Amanda Ooten

How to green the world's deserts and reverse climate change | Allan Savory

How to organize, add and multiply matrices - Bill Shillito

The art of asking | Amanda Palmer

Jennifer Granholm: A clean energy proposal -- race to the top!

Illuminating photography: From camera obscura to camera phone - Eva Timothy

Sugata Mitra: Build a School in the Cloud

Beach Bodies (in spoken word) - David Fasanya and Gabriel Barralaga

Bruno Maisonnier: Dance, tiny robots!

Insights into cell membranes via dish detergent - Ethan Perlstein

Bruce Feiler: Agile programming -- for your family

Why are blue whales so enormous? - Asha de Vos

Learn English - 4 ways to understand what you hear

Michael Dickinson: How a fly flies

Andreas Schleicher: Use data to build better schools

Visualizing the world's Twitter data - Jer Thorp

Gridiron physics: Scalars and vectors - Michelle Buchanan

Afra Raymond: Three myths about corruption

Keith Chen: Could your language affect your ability to save money?

Distorting Madonna in Medieval art - James Earle

Miguel Nicolelis: A monkey that controls a robot with its thoughts. No, really.

Inventing the American presidency - Kenneth C. Davis

Young-ha Kim: Be an artist, right now!

The secret to desire in a long-term relationship | Esther Perel | TED

Fresh water scarcity: An introduction to the problem - Christiana Z. Peppard

James B. Glattfelder: Who controls the world?

Inside OKCupid: The math of online dating - Christian Rudder

Edi Rama: Take back your city with paint

Erik Schlangen: A "self-healing" asphalt

Where we get our fresh water - Christiana Z. Peppard

Dare to Educate Afghan Girls | Shabana Basij-Rasikh | TED Talks

How Curiosity got us to Mars - Bobak Ferdowsi

"I seen it" and other stupid mistakes

Lee Cronin: Print your own medicine

The historical audacity of the Louisiana Purchase - Judy Walton

Cesar Kuriyama: One second every day

Make robots smarter - Ayanna Howard

Tyler DeWitt: Hey science teachers -- make it fun

How did trains standardize time in the United States? - William Heuisler

Zahra' Langhi: Why Libya's revolution didn't work -- and what might