AskDrCallahan provides courses of excellence in college level mathematics—for the student who is college bound or who desires true education and knowledge. Dr. Dale Callahan, an engineering professor at the University of Alabama at Birmingham, founded AskDrCallahan after he and his wife Lea began to homeschool and found many of the homeschooling math material subpar. AskDrCallahan provides a compleete high school math curriculum that will prepare your students for college and life.