Designed to help students in one-semester prealgebra courses make the transition from the concrete world of arithmetic to the symbolic world of algebra, Prealgebra, 3/e, introduces variables in Chapter 1 and integrates them throughout the rest of the text. The acclaimed Aufmann Interactive Method ensures active learning and mastery of concepts—ideal for any classroom, self-paced laboratory, or even distance learning setting. A strong emphasis on the AMATYC standards features a special focus on real sourced data as well as an algorithmic computer tutor.Projects in Mathematics activities feature applications in such fields as music, the stock market, sports, consumer trends, and nutrition.Data problems have been updated to reflect current data and trends and offer engaging topics for class discussions.A two-page Chapter Test at the end of each chapter provides opportunities for students to test their understanding and diagnose their weaknesses.