It's a nice marketing idea -- putting previews of courses online so anyone can download them. Of course, anyone has to be able to sign up for the courses to make it worthwhile, and that is also the case here with Harvard Extension's use of iTunes U to offer video previews of selected courses. Not all online courses use video, but these do, so it's a nice use of the technology. Previews for 15 of the 50 courses are available.
Check out the article at Playlist Magazine or visit the Harvard Extension iTunes U site. You'll need iTunes installed to view the videos.
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