05:12 Design, Engineering & Technology Blood, concrete, and dynamite: Building the Hoover Dam Lesson duration 05:12 1,023,104 Views
05:05 Social Studies How one of the most profitable companies in history rose to power Lesson duration 05:05 888,527 Views
04:34 Science & Technology Why do your jeans wear out so quickly? Lesson duration 04:34 365,170 Views
08:15 Social Studies Why the US Army tried to exterminate the bison Lesson duration 08:15 1,659,952 Views
09:44 Social Studies Ruby Bridges: The child who defied a mob and desegregated her school Lesson duration 09:44 491,584 Views
04:57 Literature & Language The twins who tricked the Maya gods of death Lesson duration 04:57 2,043,881 Views
05:25 Literature & Language The Norse myth that inspired “The Lord of the Rings” Lesson duration 05:25 3,067,365 Views
04:47 Social Studies Why are scientists obsessed with the Black Sea? Lesson duration 04:47 471,600 Views
04:35 Social Studies What happened to the lost Kingdom of Kush? Lesson duration 04:35 1,053,788 Views
05:26 Literature & Language The surprising origins of the word “lesbian” Lesson duration 05:26 774,334 Views
04:48 Social Studies The infamous overpopulation bet: Simon vs. Ehrlich Lesson duration 04:48 589,530 Views
05:27 Science & Technology Is this the most successful animal ever? Lesson duration 05:27 520,496 Views
05:29 Social Studies The secret society of the Great Dismal Swamp Lesson duration 05:29 312,897 Views