http://edudemic.com/2011/12/real-flipped-classroom/
This infographic from Knewton also provides a useful summary of the concept:
Created by Knewton and Column Five Media


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Chris ValentineCC BY-NC 2.0
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bert boerlandCC BY-NC-SA 2.0
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Zane SelvansCC BY-NC-SA 2.0
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Gary BrownCC BY-NC 2.0
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PaulaCC BY-NC-SA 2.0