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"As technology in the classroom becomes more advanced, textbooks may become a thing of the past. Educators are taking advantage of iPad and Kindle's flexibility"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/gadgets-electronics/stories/with-ipads-and-kindles-in-the-classroom-who-needs-to-lug-heav>