A registered nurse (RN) assesses patients, gives medications and treatments, watches for changes, documents everything, and teaches patients and families. Why this matters: patients can get worse quickly, and you are often the first person to notice. Your core habit is the nursing process: assess, diagnose, plan, implement, evaluate. Almost every task on the job is one of those five steps. In the US you must graduate from an approved nursing program (an ADN, usually 2 years, or a BSN, 4 years) and pass the NCLEX-RN to be licensed by a state board of nursing. Nursing school itself is not free,
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Stage 1 of 4 · about 16 weeks
Build the science and basic skills nursing school assumes: anatomy and physiology, basic chemistry, microbiology, medical terminology, dosage math, and how to take and understand vital signs. Practice drug calculations (dose = desired/have x quantity) until you can do them without a calculator. Finish prerequisites and apply to an accredited ADN or BSN program. Also volunteer or work as a CNA to see real patient care.
Medical terminology
Every chart, order, handoff and textbook in nursing uses this language. If you can decode words, you can understand a new diagnosis the first time you see it, and you will make fewer errors.
Anatomy and physiology
Nursing is applied A&P. You notice a falling blood pressure, a swollen ankle or slow breathing because you know what normal looks like and why it changes. Programs also require A&P I and II for admission, and strong grades help your application.
Basic chemistry and microbiology
Chemistry explains how drugs, fluids, pH and electrolytes work in the body. Microbiology explains infection, why handwashing matters, and why antibiotics are used carefully. Both are common prerequisites.
Dosage math and measurement
Medication errors can harm patients, and math errors are a leading cause. Nursing programs test this, often requiring a 90-100% score. Doing it by hand builds the habit of checking for a result that makes sense.
Vital signs and basic patient care
Vital signs are the first warning that a patient is getting worse, and you will take them dozens of times a shift. Doing it correctly and knowing what the numbers mean is a day-one skill, and working as a CNA lets you practice it for real.
Applying to nursing school
Admission to ADN and BSN programs is competitive, and a strong, organized application is how you get a seat. Choosing an accredited program is also needed to sit for the NCLEX-RN later.
Then 3 more stages (about 336 weeks in all) with lessons, drills, projects, 10 interview questions with strong answers and free resources.