Mark Gruenwald is Professor of Mathematics at the University of Evansville, where he has taught since 1989. Much of Mark's professional work has involved collaboration with Dave Dwyer, also at the University of Evansville. In addition to the Resequencing Calculus project, the two have collaborated on a series of commercially published textbooks at the precalculus level. Both are accomplished teachers, with a combined 50 plus years of experience and over 90 calculus classes between them. Both have also received teaching awards from the University of Evansville. Mark served as department chair from 1998 to 2007.