DEAN R. JOHNSON is retired from teaching mathematics and computer science at Fort Atkinson High School, Fort Atkinson, Wisconsin. His students appreciated his passion and enthusiasm for teaching in his own unique style. He has worked as a software developer and project manager for a financial start-up, Blackthorne LLC, in Whitewater, Wisconsin. He is a certified Alice trainer and has contributed exercises for the Learning to Program in Alice, 3rd edition, textbook. He and his wife, Sandy, have four children, David, Jessica, Tommy, and Jordan, who are each amazing in their own way.
CAROL A. PAYMER is retired from teaching computer science at Campolindo High School in Moraga, California. She wrote her first computer program in high school in the early 1970s. She went on to earn an ScB from Brown University and an MS from Stanford before working at Bell Labs, Atari, and various start-ups that have vanished into the ether. Raising her three extraordinary children inspired her to explore teaching and she discovered her calling. She would like to dedicate this book to the many students who fill her days with joy and a sense of purpose and to Richard who runs beside her both uphill and down.
DEBORAH B. KLIPP began teaching AP Computer Science in 1987 at Mainland Regional High School in Linwood, New Jersey. After teaching math and computer science at Mainland for 25 years, she moved to Florida with her husband and two daughters. She worked at Hillsborough County schools for six years and is currently working at Florida Virtual School. She received a Bachelor of Science in Mathematics, Computer Science minor from Pennsylvania State University and a Master of Arts degree in Education from Rowan University. She has been an AP Computer Science A reader, table leader, and question leader since 1999 and has been an AP College Board Consultant since 2001. She enjoys teaching and sharing her love and passion of AP CSA to teachers during AP Summer Institutes and College Board workshops across the country. She would like to thank her husband, Doug, and daughters, Melissa and Samantha, for all of the support they have given her over the years while she travels doing AP work, and to a few of her fellow AP readers and consultants who share this passion and inspire her (Rob, Judy, Ria, Tim, Sandy, Lester, Steve, Cody, John, Maria)—AP CS Rocks!