Ted-Ed is an extensive video library featuring brief lessons across a range of subjects, including math, literature and language, science and technology, and business and economics. TED-Ed videos include "Just How Small Is an Atom?" and "The Real Origin of the Franchise," as well as commencement speeches by Steve Jobs, Condoleezza Rice and Ellen DeGeneres, and TED-Ed talks from the likes of Malcolm Gladwell and Madeleine Albright. Each lesson also includes multiple-choice questions, open-answer questions, and links to more information on the topic. You can also share the lesson online instantly.