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I also checked out "Booming Sands" (grades 9-12), which is focused on the Dumont Dunes in Death Valley (located on the border of California and Nevada). A group of students from Caltech did research on the reason why dunes "sing" or "boom". As sand moves via the wind, potential energy changes to kinetic energy and again to acoustic energy. To be honest, this video was of NO INTEREST to me. BUT, in the classroom, I could utilize this video if I were a science teacher. Who knows? Maybe this video could inspire a student to pursue a career in dune exploration?!?!
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What I like best about the WGBH iTunesU video podcasts is that they're pretty short. The ones I checked out were no longer than 3 minutes. That's about all the time you need. Show the video to the class and follow-up with a discussion.