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Instructional Video12:49
Crash Course

The Americas and Time Keeping: Crash Course History of Science #5

9th - 12th Standards
Time, time, time ... see how it shaped an entire culture! Science scholars discover the mysteries of the Mayan and Incan cultures during the fifth video in a History of Science series. The narrator shows how these time keepers developed...
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Instructional Video2:40
University of California

Where Does Gold Come From?

9th - 12th
Gold comes from rocks, but rocks can't produce gold—so where does it really come from? The video presents two competing theories of where gold comes from and how it is produced. 
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Instructional Video4:41
TED-Ed

The History of Chocolate

8th - 12th
Since 1900 BCE the cocoa bean has been harvested, but much has changed in the ways it is harvested today. Watch and learn about the history of chocolate in an informative and interesting video.

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