HESI A2 Study Guide: Sections, Score Targets and Prep Plan

HESI A2 Study Guide: How to Prep for the Nursing School Entry Exam

The HESI A2 — short for Admission Assessment — is the entry-level standardised exam that many US nursing schools require as part of the application process. It is published by HESI, a division of Elsevier, and tests core academic skills including mathematics, reading comprehension, vocabulary, grammar and several science topics. Despite being often grouped with ATI assessments in conversation, the HESI A2 and the ATI TEAS are different exams from different publishers. Nursing schools generally accept one or the other, not both, and the right exam to study for depends entirely on which schools you are applying to.

This study guide breaks down the structure of the HESI A2, the sections you are likely to face, the score targets that competitive applicants aim for, the prep materials that consistently produce strong results, and the 6 to 12 week study plan most successful test-takers follow. The aim is to give a clear roadmap rather than a generic study-skills lecture. Nursing school admission is competitive enough that applicants who prepare structurally for the HESI A2 outperform those who treat it as a casual entrance test, and understanding the exam in detail is the first step in that structural preparation.

One frame worth keeping in mind throughout HESI A2 prep is that the test is part of a broader nursing school admissions package. Schools also evaluate prerequisite GPA, recommendation letters, healthcare experience, personal statements and sometimes interviews. A strong HESI A2 score does not by itself guarantee admission to competitive programs, but a weak score can disqualify an otherwise strong application. The exam is best understood as a baseline-clearing requirement that you want to clear comfortably rather than a single number that determines your future.

The Eight HESI A2 Sections

The HESI A2 includes up to eight separate sections that each school selects from based on its admissions priorities. Most schools require four to six. The Mathematics section covers basic arithmetic, fractions, decimals, percentages, ratios, proportions, simple algebra and household measurement conversions used in nursing dosage calculations. The Reading Comprehension section tests your ability to extract main ideas, supporting details, inferences and tone from short passages on health-related and general topics. The Vocabulary and General Knowledge section covers commonly encountered medical and general vocabulary words, with definition-style multiple choice questions.

The Grammar section tests grammar usage, sentence structure, common errors and parts of speech. The Biology section covers fundamental biological concepts — cells, genetics, ecology, organism classification. The Chemistry section covers atomic structure, chemical bonds, reactions, acids and bases, basic stoichiometry. The Anatomy and Physiology section covers human body systems at an introductory level. The Physics section, the least commonly required, covers motion, forces, energy and basic mechanics. Knowing exactly which sections your target school requires lets you focus prep time on the right material rather than studying topics that will not appear on your test.

Section selection by schools follows fairly consistent patterns. Mathematics, Reading Comprehension, Vocabulary and Grammar are the four most universally required sections — almost every nursing program tests all four. Anatomy and Physiology comes next in frequency, required by a majority of programs. Biology, Chemistry and Physics are required by progressively fewer schools, with Physics being the rarest requirement. The implication for prep planning is that the first four sections deserve heavy focus from every applicant, while science section preparation should be calibrated to specific school requirements.

What Score Do You Actually Need?

Score requirements vary widely between nursing schools. Most programs set a minimum cumulative score around 75 percent, with several setting it at 80 percent. Competitive programs at major universities often expect 85 to 90 percent for serious consideration. Some elite programs publish median admitted-student scores of 90+ percent. The scoring system is percentage-based per section, with most schools focusing on the cumulative average across required sections. A few schools require each individual section to meet the minimum independently rather than averaging — particularly important to know if your math is strong but your grammar is weaker.

The right score target for any individual applicant depends on the schools they are pursuing. Aim for the 90+ percentile if any of your target schools are competitive academic medical centers; aim for 80 to 85 percent if your target schools are reasonable state university nursing programs; treat 75 percent as the absolute minimum below which most programs will not accept the score. Practice tests give you the most reliable read on where you currently sit, and the gap between your practice average and your target score is what your structured prep period needs to close.

Score interpretation also depends on whether your school treats individual section scores or only the cumulative average. Programs that look at individual scores often set a 75 or 80 percent floor for each section independently. Strong cumulative averages with one weak section sometimes fail those individual-section minimums even though the overall average looks fine. Diagnosing whether your prospective school uses average-only or individual-minimum scoring affects how much focus you should give to your weakest section relative to your strong areas.

The Twelve-Week Study Plan

A realistic HESI A2 prep plan runs 6 to 12 weeks depending on your starting baseline. The plan opens with a diagnostic full-length practice test in week one, scored honestly to identify weak sections. Weeks two through four focus on the weakest two sections — content review chapters paired with topic-specific practice questions and detailed error log entries.

Weeks five through seven shift to the next weakest sections, with continued review of the original weak areas to maintain progress. Weeks eight through ten reintroduce full-length timed practice tests, working back through any remaining weak topics that practice tests reveal. Week eleven is consolidation; week twelve is taper week with light review and exam-day logistics.

The single biggest predictor of HESI A2 success is consistent practice questions volume. Most candidates who break 90 percent on the actual test have completed at least 1,500 practice questions across the prep period, with detailed review of every wrong answer. The discipline of converting wrong answers into structured learning — recording the question topic, the correct answer, why your wrong answer was wrong, and what to do differently next time — is what produces gradual improvement rather than stuck-in-place practice without progress.

Section-by-Section Strategy

The Mathematics section rewards thorough practice with the specific question types HESI uses. Most-tested topics are fractions, percentages, ratios and basic algebra, with a heavy dose of household-to-metric conversions that appear nowhere else in standard math curricula. Drill these specifically. The section allows 50 questions in 50 minutes, which works out to one minute per question — fast for math, especially for word problems that require setup before calculation. Practice with a stopwatch to build pacing tolerance before exam day.

The Reading Comprehension section is mostly a pacing problem. Many students who score below their target on Reading are simply running out of time. The fix is to read passages efficiently — skim for structure first, mark transitions, and answer detail questions by referring back to the specific lines rather than from memory. Order matters: many high scorers tackle the easiest passage first regardless of order to build momentum and bank time. The section's vocabulary in context questions are particularly time-sensitive because re-reading the passage costs minutes that test-takers cannot afford to spend.

The Vocabulary and General Knowledge section rewards memorisation. Building flashcard decks of unfamiliar words from your practice tests and reviewing them daily across the prep period produces measurable score gains. The section also tests common medical terms that appear in early nursing curriculum — analgesic, palpation, auscultation, prognosis — so flashcard decks serve double duty by previewing nursing school vocabulary. The Grammar section rewards the same focused drilling on the most-tested rules: subject-verb agreement, pronoun-antecedent agreement, comma usage, modifier placement, parallel structure, verb tense consistency.

The Anatomy and Physiology section rewards thorough basics rather than advanced topics. The most-tested categories are body system overviews, cellular biology, basic homeostasis and major anatomical landmarks. Memorising the eleven organ systems and their primary structures and functions covers a substantial share of the section. Most candidates who score well on A&P have invested in flashcard decks and visual atlas review rather than in textbook-style reading alone.

Chemistry and Physics, when required, reward focused fundamentals review rather than depth. The chemistry section covers atomic structure, basic chemical bonds, balancing equations, acids and bases and simple stoichiometry. The physics section covers basic motion, forces, energy and units. A general chemistry textbook from a high school or freshman college course covers more than enough content for both sections; the prep challenge is reviewing the basics efficiently rather than relearning advanced topics that the exam will not test.

Test-Day Mechanics

The HESI A2 is delivered at testing centers — typically Pearson VUE locations or directly at the nursing school, depending on the school's contract with Elsevier. Total session time runs 4 to 5 hours including breaks. You arrive 30 minutes before the scheduled start time with two valid forms of identification, including one government-issued photo ID. Personal items including phones, watches, hats, snacks and bags go into a locker outside the testing room. The testing center provides scratch material — typically an erasable whiteboard rather than paper — for math calculations and reading notes.

Each section has its own time limit displayed on screen. The clock starts when the section begins and counts down. You cannot leave the testing room during a section without forfeiting that section's score. Breaks between sections are allowed but encouraged to be brief — most candidates take a 5 to 10 minute restroom break between major sections rather than a longer pause that risks fatigue setting in mid-test. Eating during the session is generally not allowed inside the testing room; bring a snack and water for breaks if your session runs across a meal time.

Sleep discipline in the days before the test matters significantly because the exam runs four to five hours. Sleep-deprived candidates lose noticeable points in the third and fourth hour of testing as fatigue eats into focus. The week before the test should not be a cramming week. Reduce study hours, prioritise sleep and exercise, and review only your error log and a small number of high-yield flashcards. Test-day performance correlates more strongly with rest than with last-minute cramming, and most candidates who underperform their practice average can trace it back to insufficient sleep in the final 72 hours.

Cost, Retakes and Score Reporting

The HESI A2 cost varies by school because each program negotiates its own pricing with Elsevier and passes the cost to applicants. Typical fees range from $40 to $100 per attempt. Some schools include the test fee in their nursing program application fee; others bill it separately. Confirm the cost with the school's admissions office before scheduling, particularly if you plan multiple attempts to improve scores. Score reports are typically available within minutes of completing the test through the Elsevier Evolve portal, with formal reports delivered to the school within one to three business days.

Retake policies vary widely. Some schools allow unlimited retakes with the highest cumulative score counting; others impose 60-day waiting periods between attempts; a few cap attempts at two or three per year. Some programs average multiple attempts rather than taking the best — important to know because retaking with a worse result actually reduces your application strength under that policy. Always confirm the specific school's retake policy before deciding whether to retake; a confident first-attempt strategy usually produces better outcomes than a casual approach with a planned second attempt as backup.

Score validity periods also vary between schools. Most programs accept HESI A2 scores within one or two years of testing, but some require the test to have been taken within twelve months of the application deadline. If you take the test very early — say, more than a year before applying — confirm with your target schools whether the score will still be accepted. Re-taking the test purely to satisfy a validity window is a frustrating use of time and money that can be avoided with a little advance planning around the application timeline.

Common Mistakes to Avoid

The most common mistake is starting prep too late. The HESI A2 covers a substantial body of content across math, vocabulary, grammar and several sciences. Starting two weeks before the test usually produces panic and a score below your potential. The realistic minimum prep window is six weeks for already-strong students, twelve weeks for those starting from a weaker baseline. Building backwards from your test date with a structured weekly plan is far more effective than ad-hoc cramming.

The second common mistake is over-reliance on one resource. Even the official Elsevier guide eventually exhausts its useful question pool through repeated practice. Combining the official guide with one third-party question bank like Mometrix or Pocket Prep keeps the question variety fresh. The third common mistake is neglecting weak sections. Most candidates spend disproportionate time on the sections they already enjoy and ignore the ones they find harder. Honest diagnostic results combined with disciplined focus on weak sections produces better cumulative scores than comfortable repetition of strong areas.

The fourth common mistake is failing to take timed full-length practice tests. The HESI A2 tests stamina across a 4 to 5 hour session, and the cognitive load shifts noticeably in hour three and four as fatigue builds. Practice tests run under realistic timing and break conditions train the same stamina the actual exam requires. Skipping full-length timed practice and relying on shorter section drills usually produces a score one or two percentage points below the candidate's true potential because exam-day fatigue eats into performance unexpectedly.

The fifth common mistake is letting one weak section discourage the whole prep effort. Many applicants score well on initial diagnostic tests across most sections but stumble on one specific section — often math or grammar. The temptation is to abandon the prep when one section feels stuck. The discipline of working with a tutor, finding alternative explanations through different prep resources, or simply spending more time on that section's question bank usually closes the gap. Persistent weakness in one section rarely survives 20 to 30 hours of focused practice.