How to Study for HESI A2: A Step-by-Step Plan

Short answer

To study for the HESI A2, you need to master the seven content sections using the exact item counts published by the test maker: 50 math, 47 reading, 50 vocabulary, 50 grammar, 25 biology, 25 chemistry, and 25 anatomy and physiology. That is 272 items total, and you must prepare for every section because nursing programs commonly require all seven scores. Start by taking a timed diagnostic test to identify your weakest areas, then spend the majority of your study time on those sections. Use a question bank that mirrors the real blueprint and provides step-by-step explanations for every answer. A structured weekly plan that rotates through all seven subjects with built-in review days will give you the consistency you need. Avoid cramming vocabulary lists the night before the exam. Instead, learn words in context by reading aloud and using flashcards daily. For math, drill conversions, fractions, decimals, ratios, and basic algebra until they are automatic. For science, focus on core concepts from introductory biology, general chemistry, and human anatomy. You schedule the exam directly with the test maker or testing centre, so check current availability there. The admitnurse.com pool holds 4672 verified practice questions with explanations, timed section tests, a missed-questions pool, and an AI tutor to support your plan.

What this actually involves

The HESI A2 is not a single national exam with a fixed date. It is offered on demand at test centres across the country, which means you choose your own testing window. That flexibility is valuable, but it also means you must take responsibility for your own schedule. The test has 272 scored items, and the time limits vary by section. Math gives you 50 items, reading gives you 47, vocabulary and grammar each give you 50, and the three science sections biology, chemistry, and anatomy and physiology each give you 25 items. Every question is multiple choice. There are no free-response or essay portions on the core academic sections. Some schools also require a separate writing or personality assessment, but those are not part of the 272-item count and are not covered by the admitnurse.com question pool. You will receive a composite score and individual section scores. Each nursing program sets its own cut score, so you need to confirm the minimum required for your target schools. The exam is administered by Elsevier, and you should verify the exact cost and available seats with the testing centre because those details change by location and time.

The content is not trick-based. Math covers basic operations, fractions, decimals, percentages, ratios, proportions, and word problems that require setting up equations. There is no calculus. Reading includes passages followed by questions about main idea, supporting details, inference, and vocabulary in context. Grammar tests punctuation, subject-verb agreement, pronoun usage, and sentence structure. Vocabulary uses healthcare-adjacent words you are expected to know, not obscure medical terminology. Biology covers cell structure, photosynthesis, cellular respiration, genetics, and basic ecology. Chemistry goes up to stoichiometry, atomic structure, bonding, and solutions. Anatomy and physiology emphasizes the major organ systems, their functions, and basic homeostasis mechanisms. The question pool on admitnurse.com was built to match these exact topics and item counts, so every practice session directly reflects what you will see.

Who this applies to

This guide is for anyone who needs to take the HESI A2 as part of a nursing school application. That includes high school graduates applying to an associate degree in nursing (ADN) program or a bachelor of science in nursing (BSN) program. It also applies to career changers who have a non-nursing bachelor degree and are applying to an accelerated BSN or an entry-level MSN. If you are a licensed practical nurse (LPN) or licensed vocational nurse (LVN) moving into an RN program, you will likely need the HESI A2 as well. Some schools accept the TEAS 7 as an alternative, and you can compare the two using the TEAS vs HESI comparison page on admitnurse.com. If your program requires the HESI A2, you cannot substitute another exam without confirmation from the admissions office. You should also check whether your school requires all seven sections or only a subset. Many nursing programs require the reading, math, vocabulary, grammar, and anatomy and physiology sections, and some waive biology and chemistry depending on prior coursework. Do not assume anything. Contact the admissions office and ask for the exact sections required. If you are retaking the exam to improve a low section score, focus exclusively on that one section while maintaining a light review of the others. The HESI A2 passing score page explains how schools typically use percentile scores, but remember that each program sets its own threshold.

How to prepare

Preparation for the HESI A2 breaks down into four phases: diagnostic, content review, active practice, and final readiness. Start with a full-length timed diagnostic test using a reputable question bank. Do not study beforehand. This test will reveal your baseline strengths and weaknesses. Record your scores for each of the seven sections. Then create a study schedule that allocates more time to the sections where you scored lowest. For example, if you score 70 percent on math but 40 percent on chemistry, spend twice as many chemistry sessions as math sessions. The admitnurse.com platform lets you filter questions by subject so you can drill exactly what you need.

• Gather your materials. You need a question bank with at least 4672 practice items, step-by-step explanations, and timed mode. You also need a notebook for error logging and a set of physical or digital flashcards for vocabulary and science terms.
• Learn the vocabulary words by reading them in sentences, not by memorizing isolated definitions. Use the vocabulary section of the admitnurse.com question pool to see words used in healthcare contexts. Write each unknown word on a flashcard with a sentence from the explanation.
• Drill math fundamentals every day for 15 minutes. Focus on fraction operations, decimal multiplication and division, percentage conversions, ratio and proportion setups, and unit conversions. Do not use a calculator during timed drills because the real exam does not allow one on the math section.
• For science, use the 25-item sections as mini-tests. Review one biology topic per day, such as cell membrane transport, then take a timed 10-question set. Immediately review each wrong answer using the explanation provided. Repeat for chemistry and anatomy and physiology.
• Take one full-length timed practice test every two weeks during your preparation. Simulate the testing environment: no phone, no breaks except the ones allowed by the test centre, and a strict time limit for each section. Compare your scores to your diagnostic to track improvement.

Common mistakes

• Skipping the writing or grammar section because you assume it is easy. The grammar section has 50 items with subtle punctuation and usage rules. Many candidates underestimate it and then score lower than expected. Do not neglect any section until you confirm your school does not require it.
• Studying without timing yourself. The HESI A2 is a timed exam, and many candidates run out of time on the reading section because they read too slowly. Always use the timed mode in the practice platform to build speed and pacing.
• Memorizing vocabulary without context. When you see a word on the real exam, it will appear in a sentence. If you only know the dictionary definition, you might miss the nuance. Practice with sentence-based questions only.
• Treating the three science sections as one subject. Biology, chemistry, and anatomy and physiology test different knowledge bases. Do not study only anatomy and assume biology and chemistry will be fine. Each section has 25 items, and you need a passing score on each individually if your school requires it.
• Ignoring the missed-questions pool. After every practice test, review each incorrect answer and log the concept you missed. Then use the missed-questions pool on admitnurse.com to retake only those topics until you get them right consistently. This is the fastest way to raise your score.

A study plan that works

A proven study plan for the HESI A2 spans 8 weeks, assuming you study 90 minutes per day, six days per week. Adjust the duration up or down depending on your diagnostic scores. If your diagnostic shows that you are already above the required cut score in two sections, you can reduce the time spent on those sections and add it to weaker areas. The plan below uses the verified item distribution and works regardless of your starting point.

Week 1: Take a full-length timed diagnostic test on day one. Record your section scores. For the remaining six days, spend 30 minutes on vocabulary flashcards, 30 minutes on math fundamentals (fractions, decimals, percentages), and 30 minutes on reading comprehension passages. Do not touch science yet. The goal is to rebuild your English and math baseline because those sections are the most common requirements. At the end of week 1, review your diagnostic errors and note which question types you missed.

Week 2: Introduce the three science sections. Alternate days: Monday and Thursday focus on biology (cell structure, mitosis, meiosis, basic genetics), Tuesday and Friday focus on chemistry (atomic structure, bonding, stoichiometry), Wednesday and Saturday focus on anatomy and physiology (skeletal system, muscular system, nervous system). Spend 45 minutes per science session using the admitnurse.com timed 25-item tests. The remaining 45 minutes of each session should be split between vocabulary and grammar drills. Continue daily math review for 15 minutes.

Week 3: Increase the intensity. Take a full-length timed practice test on Saturday of week 3. Use the results to identify which science section needs the most work. In week 4, spend 60 minutes on that weak science section every day, 30 minutes on vocabulary and grammar combined, and 30 minutes on math. For the other two science sections, do one timed 25-item test per week. The admitnurse.com platform allows you to filter by subject, so you can create custom 25-question sets that mirror the real test.

Weeks 5 and 6: Rotate through all seven sections in a two-day cycle. Day one: math (50 timed items), vocabulary (50 timed items), grammar (50 timed items). Day two: reading (47 timed items), biology (25 timed items), chemistry (25 timed items), anatomy and physiology (25 timed items). On day seven of each week, take a full-length timed test. Review every error immediately using the explanations. Add missed questions to the missed-questions pool on admitnurse.com and retake them the following day.

Week 7: Focus on your three lowest-scoring sections based on the week 6 test. For each of those sections, take two timed 25-question sets per day. For the other four sections, take one timed set every other day to maintain retention. Continue your daily 15-minute math warm-up. Do not skip vocabulary; it is a 50-item section and small daily practice matters.

Week 8: Take a full-length timed practice test on Monday and again on Wednesday. Review all errors thoroughly. On Thursday and Friday, review only your missed-questions log and the flashcards for words you still get wrong. Rest on Saturday. Schedule your exam for the following week. Confirm the exam availability and time with the test centre directly. On exam day, arrive early, bring the required identification, and trust the process you have followed for the last eight weeks. You will have seen hundreds of questions that look just like the real ones because you practiced with a blueprint-accurate question pool.

Important: The admitnurse.com question pool contains 4672 original practice items written to the published exam blueprint. These are not real exam questions. They are designed to give you the same difficulty, style, and content coverage so that you walk into the test centre confident and prepared. TEAS is a registered trademark of Assessment Technologies Institute, LLC, HESI is a registered trademark of Elsevier Inc., and NCLEX and NCLEX-RN are registered trademarks of the National Council of State Boards of Nursing, Inc. (NCSBN). admitnurse.com is an independent practice service and is not affiliated with, sponsored by, or endorsed by ATI, Elsevier, NCSBN, or any nursing school.