Maryam Tsegaye, writes Tony Bates, "demonstrates so well many of the educational affordances of video, and shows what a powerful teaching medium video can be when used properly." Now to be clear, there are thousands, maybe even millions, of videos like hers teaching viewers any number of topics. I watch quite a number every day (and in fact had seen this one before Bates's column). What I like about this article, though, is how Bates pulls out of it the factors that make it effective instruction: it's short, clear, has a strong narrative, is concrete, stands on its own, uses humour, makes the subject relevant, and is open access. "It also raises the question of what constitutes 'academic' knowledge," writes Bates. "I certainly see the video as a valuable step towards understanding quantum tunnelling."
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