Becoming a nurse requires a mix of science prerequisites, general education courses, and nursing-specific classes that build from classroom theory to hands-on patient care. The exact number varies by school and degree type, but most programs require between five and fourteen prerequisite courses before you even start the nursing major itself. Here’s a clear breakdown of what to expect at each stage.
Science Prerequisites You’ll Take First
Before you’re admitted to a nursing program, you need to complete a set of foundational science courses. These are typically taken during your first year or two of college, and they’re the classes admissions committees weigh most heavily.
Anatomy and physiology is the backbone of your prereqs. Most programs require two semesters (often called A&P I and A&P II), each with a lab component. You’ll learn how every major body system works, from the cardiovascular system to the musculoskeletal system. This is the course that directly prepares you for clinical practice, and nursing schools expect strong grades here.
Biology is another core requirement, and many schools also require microbiology as a separate course. In microbiology, you’ll study how pathogens cause infection, how to identify different types of bacteria and fungi under a microscope, and how antimicrobial drugs work. The lab portion covers specimen collection, diagnostic testing, and techniques for controlling the spread of infection. These skills translate directly into infection prevention on the job.
Chemistry rounds out the science prerequisites. Most programs require one semester of general chemistry or introductory chemistry with a lab. Some BSN programs require a second semester or a dedicated biochemistry course. You won’t be doing complex organic chemistry, but you need enough chemistry to understand how medications interact with the body.
General Education and Social Science Courses
Nursing programs require more than hard science. You’ll also take several general education courses, many of which are built into your first two years of college.
Introduction to psychology is required at nearly every nursing school. Understanding how people think, cope with stress, and process illness is fundamental to patient care. Some programs also require developmental psychology or a dedicated growth and development course that covers how people change physically and mentally from infancy through old age.
A nutrition course is commonly required as well. You’ll learn how diet affects disease management, wound healing, and overall health, knowledge you’ll use constantly when educating patients. English composition (usually two semesters), statistics, and sometimes sociology or a communication course fill out the general education requirements. Statistics matters more than you might expect: nurses need to read and interpret research studies to follow evidence-based practice guidelines.
Core Nursing Courses in the Program
Once you’re admitted to the nursing program itself, your coursework shifts entirely to nursing-specific classes. These typically span two years for a Bachelor of Science in Nursing (BSN) and are taken in a structured sequence where each course builds on the last.
You’ll start with introductory nursing courses and health assessment, where you learn to take vital signs, conduct physical exams, and document patient findings. Alongside this, you’ll take pathopharmacology, which combines the study of how diseases develop in the body with how medications treat them. This is one of the most demanding courses in the program, and it’s usually split across two semesters.
From there, the curriculum moves into population-specific nursing courses:
- Adult health nursing (often called medical-surgical nursing) covers care for adults with conditions like heart disease, diabetes, and post-surgical recovery. Most programs dedicate two semesters to this area because it’s the broadest category of nursing practice.
- Pediatric nursing focuses on caring for infants, children, and adolescents, including how their care differs from adults in medication dosing, communication, and developmental considerations.
- Maternal and newborn nursing covers pregnancy, labor and delivery, postpartum care, and newborn assessment.
- Psychiatric and mental health nursing prepares you to care for patients with conditions like depression, anxiety, schizophrenia, and substance use disorders.
- Public health or community nursing shifts the focus from individual patients to population-level health, including disease prevention, health education, and working with underserved communities.
Near the end of the program, you’ll take courses in nursing leadership, professional ethics, and research methods. A research and evidence-based practice course teaches you how to evaluate clinical studies and apply findings to patient care. Leadership coursework prepares you to manage teams, delegate tasks, and navigate healthcare systems. Most programs finish with a capstone or transition-to-practice course that ties everything together before you enter the workforce.
Clinical Hours Alongside Your Courses
Nursing isn’t just classroom learning. Throughout the nursing-major portion of your program, you’ll spend significant time in supervised clinical rotations at hospitals, clinics, and community health settings. The general guideline many programs follow is a 1:3 ratio, meaning for every hour of classroom instruction, you complete roughly three hours of clinical practice.
Clinicals aren’t a separate class you sign up for on their own. They’re embedded into your nursing courses, so when you’re taking psychiatric nursing in the classroom, you’re also spending time each week on a psychiatric unit. These rotations give you hands-on experience with real patients under the supervision of a clinical instructor. By the time you graduate, you’ll have rotated through most major areas of nursing care.
How ADN and BSN Coursework Differs
There are two main paths to becoming a registered nurse: an Associate Degree in Nursing (ADN), which takes about two years, and a BSN, which takes four. Both qualify you to sit for the NCLEX-RN licensing exam, but the coursework differs in scope.
ADN programs cover the same science prerequisites (chemistry, anatomy, biology, psychology, English) and core clinical skills like fundamentals of nursing, medical-surgical nursing, pediatric nursing, community health, and psychiatric nursing. You graduate ready to provide direct patient care.
BSN programs include all of that plus additional coursework in areas like nursing theory, public health, ethics, pathophysiology, research methods, and leadership. These extra courses are what make a BSN take four years instead of two, and they’re increasingly important for career advancement. Many hospitals now prefer or require a BSN, and you’ll need one if you ever want to pursue graduate-level specializations like nurse practitioner or nurse educator roles.
A Typical Course Sequence at a Glance
While every school structures things slightly differently, here’s the general progression most students follow:
- Year 1: General education courses (English, psychology, statistics) and science prerequisites (biology, chemistry, anatomy and physiology I)
- Year 2: Remaining prerequisites (anatomy and physiology II, microbiology, nutrition, developmental psychology) and application to the nursing program
- Year 3: Introductory nursing courses, health assessment, pathopharmacology, adult health nursing, maternal-newborn nursing, and corresponding clinical rotations
- Year 4: Pediatric nursing, psychiatric nursing, public health nursing, leadership, research, and a capstone clinical experience
For ADN students, the prerequisite courses and nursing courses are compressed into a tighter timeline, often with prerequisites completed before entering the two-year program or taken concurrently during the first semester. The nursing-major courses are similar but with fewer theory and leadership components.
Regardless of which path you choose, expect a heavy science workload in the early stages and an increasingly clinical, hands-on focus as you progress. The prerequisite courses are where many students struggle most, particularly anatomy and physiology and microbiology, so building strong study habits early makes the rest of the program more manageable.