From the Author A cross-reference between the math topics in this book and the problems in the 4 official practice tests published in The Official ACT Prep Guide 2018-2019 can be found at mathprepbooks.com/errata.html. These are the same as the first 4 official practice tests published in The Official ACT Prep Guide 2019-2020.I enjoy hearing from readers, so please feel free to send email to [email protected] Despite a thorough editing of the material in this book, it is inevitable that mistakes were missed and I apologize for them in advance. If you find an error please send an email. Errors that are found in the book will be posted promptly at mathprepbooks.com/errata.html . That same web page will contain links to any supplemental materials written after the publication of this book. Product Description This book contains everything you need to know in order to achieve your full potential on the math ACT. It can be used as a standalone text or as a companion to the official prep guides published by ACT. This second edition replaces the first edition, which sold more than 26,000 copies. In addition to updated content to reflect changes in the math ACT, this edition contains several improvements. The most important improvement is in the way it is structured. The structure enables students with high target scores (well over 30) to zero in on the material they need without getting bogged down in math fundamentals; whereas students with more modest target scores can focus on the fundamentals without being distracted by advanced material not needed to hit their targets. Other improvements include more challenging problems to reflect the increasing difficulty of the test, expanded treatment of advanced topics that appear on the test less frequently, many more calculator tips with screen shots from the TI-84 family of calculators, and an improved tips and techniques section for taking the test. The strengths of the earlier material are preserved, including a comprehensive review of early math (averages, percentages), followed by topics from algebra 1, geometry, algebra 2, pre-calculus and statistics. For these, there are 38 lessons, more than 550 homework problems, solutions to the homework problems, and calculator tips. The book also contains extensive advice on how to take the math ACT, including pacing, how to take and learn from taking practice tests, and test-taking techniques. About the Author Richard Corn tutors high school students in math and standardized test preparation for the ACT and SAT. His tutoring students have increased their math scores by as much as 210 SAT points (or ACT equivalent), and his prep books have sold more than 45,000 copies. For more information please visit his web site at mathtutorct.com.His students have gone on to attend many top colleges, including Amherst, Babson, Bates, Berkeley, BC, Bowdoin, Brown, Bucknell, Claremont McKenna, Colgate, Columbia, Cornell, Dartmouth, Davidson, Duke, Emory, Georgetown, Hamilton, Johns Hopkins, Lehigh, MIT, Michigan, Middlebury, Mt Holyoke, NYU, Northwestern, Penn, Princeton, RPI, Smith, Stanford, Tufts, Tulane, UNC, UVA, Vanderbilt, Vassar, Villanova, Wake Forest, Washington University, Wesleyan, West Point, and Yale.