Source: Nick Wingfield - The N.Y. Times ( Paid Registration )

Anyone who wants to learn calculus, statistics or ancient Greek history can take free online courses in those subjects at a variety of sites from instructors with distinguished academic pedigrees. For more mundane pursuits, like learning how to paddleboard or build a planter box for the garden, there is an inexhaustible supply of free how-to videos on YouTube, eHow and other sites.

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