Revision history for entry Stylianou, Despina A.; Blanton, Maria L.; Knuth, Eric J. (2009). "Teaching and Learning Proof Across the Grades: A K-16 Perspective" [STYTAL]

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2014-03-16T21:20:43updateSystem / admin update -
2013-01-06T22:20:04update
2010-10-23T05:10:11updateSystem / admin update -
2009-01-25T12:47:12updateSystem / admin update -