Many nursing courses include theory and clinical components. Total clock-hours of theory time are based on 55 minutes of classroom instruction per credit hour per 14 weeks (one trimester). Total clock-hours of clinical time are based on three (3) hours of clinical instruction per credit hour per 14 weeks (one trimester). Total clock-hours of lab time are based on two (2) hours of instruction per credit hour per 14 weeks (one trimester). Theory, clinical, and lab components of each nursing course must be satisfactorily completed in order for course credit to be granted. Online nursing courses are designated by the DNRS course letters.