Revision history of "Toothbrush Problem"

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  • (cur | prev) 13:19, 3 May 2009Koedinger (Talk | contribs). . (424 bytes) (+424). . (New page: Apparently it was first said about theories in Psychology, but it applies as well in learning sciences: "Theories are like toothbrushes. Everyone has their own and no one wants to use anyo...)