Marvin L. Bittinger, has been teaching, writing, and speaking for over 38 years. Since receiving has Ph.D. in Mathematics Education from Purdue University in 1968, he has been at Indiana University/Purdue University at Indianapolis where is now a Professor Emeritus of Mathematics Education. He is one of Addison-Wesley’s top-selling authors, having sold over 12 million copies of his college mathematics textbooks in 195 boks and editions. Dr. Bittinger is a regular speaker at mathematics education conferences, and at Christian conferences for college students, national Christian academic conferences, and churches. For more details on Marv’s bio see the VITA