Marvin Bittinger For over thirty years Professor Marvin L. Bittinger has been teaching math at the university level. Since 1968 he has been employed as a professor of mathematics education at Indiana University - Purdue University, Indianapolis. Professor Bittinger has authored 160 publications on topics ranging from Basic Mathematics to Algebra and Trigonometry to Brief Calculus. He received his BA in Mathematics from Manchester College in 1963 and his PhD in Mathematics Education from Purdue University in 1968. Special honors include being Distinguished Visiting Professor at the United States Air Force Academy and being elected to the Manchester College Board of Trustees from 1992 to 1999. His hobbies include hiking, baseball, golf, and bowling and he enjoys membership in the Professional Bowler's Association and the Society for the Advancement of Baseball Research.

Professor Bittinger has also had the privilege of speaking at a recent mathematics convention giving a lecture entitled, Baseball and Mathematics. In addition, he also has an interest in philosophy and theology, in particular, apologetics. Professor Bittinger currently lives in Carmel, Indiana with his wife Elaine. He has two grown and married sons, Lowell and Chris, and three grandchildren.

Judy Beecher has an undergraduate degree in mathematics fromIndiana University and a graduate degree in mathematics fromPurdue University. She has taught at both the high school and college levels with many years of developmental math and precalculusteaching experience at Indiana University Purdue University Indianapolis. Inaddition to her career in textbook publishing,she spends time reading, traveling, attending the theater, and promoting charity projects for a children's camp.

David Ellenbogen has been teaching community college mathematics for over twenty years. Born in Weehawken, New Jersey, David graduated with honors from Bates College. After teaching high school mathematics for two years, David earned a masters degree from the University of Massachusetts. He has taught at Greenfield Community College and Cape Cod Community College in Massachusetts, as well as at Saint Michaels College and The University of Vermont. For the past seven years David has been a part time lecturer for the Community College of Vermont where he has served on their statewide math curriculum committee. Currently residing in Colchester, Vermont, David enjoys playing the piano, downhill skiing, basketball, bicycling, hiking, and coaching. He has two sons and a wolf/husky hybrid.

Judy Penna received her undergraduate degree from Kansas State University in mathematics and her graduate degree from the University of Illinois in mathematics. Since then, she has taught at Indiana University Purdue University Indianapolis and at Butler University, and continues to focus on writing quality textbooks for undergraduates students taking mathematics. In her free time she likes to travel, read, knit and spend time throughout the U.S. with her husband and children.