William C. Coscarelli teaches fulltime at Southern Illinois University Carbondale in the department of Curriculum & Instruction. He is the former co-director of the Hewlett-Packard World Wide Test Development Center. He was elected as president of the Association for Educational Communications and Technology Division for Instructional Development, appointed as founding editor of Performance Improvement Quarterly, and was elected as the president of the ISPI (International Society for Performance Improvement).