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Journal of Mathematical Behavior > 2013 > 32 > 3 > 633-648
Teaching and Teacher Education > 2008 > 24 > 5 > 1317-1332
Teaching and Teacher Education > 2004 > 20 > 1 > 77-97
Journal of Mathematical Behavior > 2013 > 32 > 3 > 633-648
Teaching and Teacher Education > 2008 > 24 > 5 > 1317-1332
Teaching and Teacher Education > 2004 > 20 > 1 > 77-97