04:34 How do ocean currents work? - Jennifer Verduin Lesson duration 04:34 Manage Library 2,647,631 Views
03:56 Why does ice float in water? - George Zaidan and Charles Morton Lesson duration 03:56 Manage Library 1,814,839 Views
04:57 How to turn protest into powerful change - Eric Liu Lesson duration 04:57 Manage Library 367,616 Views
03:42 Self-assembly: The power of organizing the unorganized - Skylar Tibbits Lesson duration 03:42 Manage Library 76,021 Views
03:58 Newark will allow 16-year-olds vote for school board Lesson duration 03:58 Manage Library 619 Views
12:51 How to build democracy — in an authoritarian country - Tessza Udvarhelyi Lesson duration 12:51 Manage Library 40,136 Views
04:30 Five simple strategies to sharpen your critical thinking Lesson duration 04:30 Manage Library 718,583 Views
05:31 Social Studies The underground cities of the Byzantine Empire Lesson duration 05:31 Manage Library 505,985 Views
05:43 Health What causes addiction, and why is it so hard to treat? Lesson duration 05:43 Manage Library 573,693 Views
05:17 Social Studies Why was the Rosetta Stone so important? Lesson duration 05:17 Manage Library 514,151 Views
05:20 Social Studies One of the world’s oldest condiments Lesson duration 05:20 Manage Library 679,208 Views
04:25 Philosophy & Religion 5 philosophers on anger Lesson duration 04:25 Manage Library 283,955 Views
05:35 Social Studies How humanity got hooked on coffee Lesson duration 05:35 Manage Library 1,357,341 Views
04:52 Literature & Language Will the real Fernando please stand up? Lesson duration 04:52 Manage Library 290,299 Views