03:52 Science & Technology All of the energy in the universe is... Lesson duration 03:52 454,317 Views
04:31 Civics The fight for the right to vote in the United States Lesson duration 04:31 789,713 Views
03:48 Physical Science The strengths and weaknesses of acids and bases Lesson duration 03:48 1,049,314 Views
17:25 Performing Arts The El Sistema music revolution - Jose Antonio Abreu Lesson duration 17:25 29,870 Views
04:08 Performing Arts The science of stage fright (and how to overcome it) Lesson duration 04:08 1,639,453 Views
04:00 Earth and Space Science Why extremophiles bode well for life beyond Earth Lesson duration 04:00 140,976 Views
03:57 Literature & Language Speech acts: Constative and performative Lesson duration 03:57 211,815 Views
