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university-level calculus course taught online.
http://www.distancecalculus.com/
http://www.karlscalculus.org/
Cresources for the calculus student, instructor, and links to other resources.
http://www.calculus.org/
papers that explore a new point of view on the calculus, inspired by the realization that a stronger definition of the limit can banish divergence from the logical foundations of the subject.
http://www.limit.com/