What is Your Back of the Napkin Learning? #ipdx13 #PenAndPaperWorksSometimes By Ben Wilkoff February 17, 2013 February 17, 2013 Ben Wilkoff, ipdx13, PenAndPaperWorksSometimes What is Your Back of the Napkin Learning? #ipdx13 #PenAndPaperWorksSometimes
