Medical instruction cards are something I am looking around for, as well, but I can tell you that there are some passable knot cards. The kind I remember the name of are Pro-Knots - there are different ones, such as fishing knots, flyfishing knots, and rope knots. Not bad, about 5 or 6 double-sided leaves per "book", normal wallet card size, maybe a bit thicker per leaf than Nading cards.<br><br>