Dr. Patrick McGreevy is a Board Certified Behavior Analyst with over 30 years of experience with children and adults of all ages with developmental disabilities. Dr. McGreevy received B.S. and M.A. degrees from the University of Iowa and the Ph.D. degree in Education from Kansas University, where he was a student of Ogden R. Lindsley, who, in turn, was a student of B.F. Skinner. He was a special education teacher for eight years and served on the faculties of the University of Missouri-Kansas City, Louisiana State University, and the University of Central Florida. He is the author of Teaching and Learning in Plain English and eight journal articles, and is the founder of the Journal of Precision Teaching and Standard Celeration Charting. For the past 30 years, he has served as a functional life skills consultant to school districts, residential programs, and private schools in North America and Western Europe. In 2000, he was part of the first group of board certified behavior analysts. He directs a clinic in Orlando, FL and serves as an assistant professor in the Applied Behavior Analysis Program at the Florida Institute of Technology. He is the first author of Essential for Living, a new functional life skills curriculum, assessment, and professional practitioner’s handbook for children and adults with moderate-to-severe disabilities.