Rebecca Rapoport holds degrees in mathematics from Harvard and Michigan State. From her first job out of college, as one of the pioneers of Harvards internet education offerings, she has been passionate about encouraging her love of math in others As an early contributor to both retail giant Amazon.com and Akamai Technologies, the No. 1 firm in cloud computing, Rapoport played a key role in several elements of the internet revolution. Rapoport returned to her first love, education, as an innovator of new methods to introduce children and adults to the critically important world of STEM as COO of Einsteins Workshop, an enrichment center dedicated to helping kids explore the creative side of science, technology, engineering, art, and math (STEM/STEAM). One of Einsteins Workshops most popular classes for 6- to 10-year-olds is Recreational Math, whose popularity inspired the creation of this book. More recently, Rapoport co-founded a start-up creating a mobile app for sharing dynamic, mappable guides that tell stories, impart knowledge, and create unique experiences.J. Yoder is an educator who has a lifetime love of puzzles and patterns. Her educational philosophy is that hands-on creative work is both the most fun and the most effective way to learn. Some of her happiest memories come from eureka moments--either from learning something that makes a dozen other things suddenly make sense, or the sense of accomplishment that comes from solving a clever puzzle--the only thing better is sharing this joy with others.