This is a good post outlining the history of learning objects as it developed roughly 20 years ago (hatrd to believe it has been that long!). They were a good idea, but as Weller notes, they never really took off. Why? Weller outlines some reaons: overengineering ("they became so overengineered and full of accompanying metadata, that no-one would create them "), definition debates ("tight definitions around having a learning objective or meeting a specific standard"), the reusability paradox (" reusability and pedagogical effectiveness are completely orthogonal to each other"), and unfamiliarity (" the very idea seemed quite alien to many teachers, and particularly in terms of digital content"). I think these are pretty good explanations myself and agree that they are lessons we should keep in mind for future technology.
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