His areas of teaching are related to the acute and chronic care of the teenage and adult populations. Dr. Harrell has teaching experience in graduate and undergraduate nursing programs, including a broad variety of didactic and clinical courses including pathophysiology, pharmacology, health assessment, trends and issues in nursing, nursing leadership, adult health nursing, critical care nursing, advanced practice nursing, gross anatomy, and health care informatics. He has advised several doctor of nursing practice students and has created and taught several masters and doctoral level nursing courses.