https://learnlab.org/mediawiki-1.44.2/index.php?action=history&feed=atom&title=Toothbrush_ProblemToothbrush Problem - Revision history2026-04-29T08:24:07ZRevision history for this page on the wikiMediaWiki 1.44.2https://learnlab.org/mediawiki-1.44.2/index.php?title=Toothbrush_Problem&diff=9073&oldid=prevKoedinger: 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...2009-05-03T17:19:48Z<p>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...</p>
<p><b>New page</b></p><div>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 anyone else's". For a contemporary discussion of this problem, its causes and ramifications see [http://www.psychologicalscience.org/observer/getArticle.cfm?id=2430 the Presidential Column in the December, 2008 issue of the APS Observer].</div>Koedinger