Linda Brooke Stabler holds a Ph.D. in Biology from Arizona State University and teaches biology at Redlands Community College in Oklahoma. Mark Metz works for the U.S. Department of Agriculture and holds a Ph.D. in Environmental Science from the University of Illinois. He taught biology at the university level for four years. Paul Gier is Professor of Biology at Huntingdon College in Alabama. Allison Wilkes has a masters degree from the University of West Florida in marine biology. She's currently working on her Ph. D. at Texas A&M University. She has been teaching the MCAT for Kaplan since 2005.