For years, I'd share Grey's short videos with my sixth graders. He has said that it takes 10-20 hours of work for every minute of video created. Here's a favorite, a primer on the European Union, in under 6 minutes. It's well worth it. Keep in mind, this is pre-Brexit. And yes, he has a video explaining that British fiasco!
https://www.youtube.com/watch?v=O37yJBFRrfg
Peter T.
