Practice, in a novel way, the time-honored tradition of giving tips for good service by learning how to make a dozen origami money folds with eye-catching geometric designs. Clear folding steps with photographic detail enable you to fold all or most of the tips in a reasonably short time. The tips involve one, two, three, four, or six one-dollar bills, and all of them clearly display the face or faces of George Washington.About the Author: Arnold Tubis is a retired physics professor who was a faculty member at Purdue University in West Lafayette, Indiana from 1960 to 2000 (nine years as department head). He now lives in Carlsbad, California. Origami has been an avocation of his since the early 1960s and his models have been exhibited in the USA, Japan, Europe, and Israel. He is the co-author of Decorative Origami Boxes from Single Squares (with Leon Brown, British Origami Society, 2003), Unfolding Mathematics with Origami Boxes (with Crystal Elaine Mills, Key Curriculum Press, 2006), and Fun with Folded Fabric Boxes (with Crystal Elaine Mills, C&T Publications, 2007). He has also authored or co-authored about 15 papers on origami in K-12 mathematics education. He is currently focused on designing models that require, at most, a low-intermediate folding skill level, and can be used to enrich the teaching of geometry in middle school and high school. He is currently the coordinator of the Greater San Diego Origami Group.