Dr. Madtes holds an earned PhD in Biochemistry from Texas A&M University. He also holds a PhD in Biblical Counseling from Trinity Theological Seminary. He is currently a professor emeritus at Mount Vernon Nazarene University and has published papers in Neuroscience and other fields as well as contributions to textbooks.
Dr. Wile holds an earned PhD from the University of Rochester in Nuclear Chemistry. He has been writing science courses for homeschool since 1995. He is currently on the faculty of Memoria University.