How long is the prerequisite course NRS 100: Introduction to Vocational Nursing? July 28, 2022 15:27 It is a full-semester course (16 weeks) that is offered in fall or spring semesters. Related articles How do I get into the prerequisite course NRS 100: Introduction to Vocational Nursing? Financial Aid Workshops How do I register for Auto/MTRK courses? How do I add or drop courses?