What You Actually Need to Know About Hesi Study Materials
The HESI A2 exam is one of those gatekeeping tests that nursing programs use to filter applicants. It covers reading comprehension, math, grammar, biology, chemistry, anatomy, and physiology. The study guide you find floating around online usually claims to have 2022 updates, but the actual content hasn't changed drastically from previous years. Most of the question format and difficulty level stays consistent. What does change is where you find legitimate practice material without getting scammed or wasting money on outdated PDFs. I spent about three weeks tracking down legitimate free resources when I was prepping for this myself. The thing nobody tells you is that the official HESI materials are expensive—sometimes over $100 for a full study guide package. Most of the free versions circulating online are either pirated copies of commercial guides or compilations scraped from various quizlet sets and YouTube channels. I found a decent combination of resources by looking at Reddit threads from people who had recently taken the exam. There were some solid links to free practice questions hosted on academic forums. The most useful ones tended to be the older edition PDFs that people generously shared, since the core content between editions is roughly 85 percent overlapping. One specific problem I ran into was that some of the free guides had typos in the answer keys, especially in the math and chemistry sections. I caught this when two different resources gave conflicting answers for the same problem. The workaround was to cross-reference every answer with a second source before accepting it. For the math section specifically, I kept a separate notebook and worked through every problem independently rather than just reading the solutions. That took longer but prevented me from memorizing wrong answers for the actual exam.
If you want a single searchable resource that covers the major topics, you can find a compiled Hesi Study Guide 2022 Free version through academic document-sharing sites. Just verify the answer key before you rely on it heavily. Another approach that works well is using free flashcard platforms and filtering for HESI-specific decks with high engagement ratings. The volume of free material available is actually an advantage if you know how to filter the noise.
How the Exam Actually Works in Practice
The HESI A2 is timed and adaptive in certain sections, which means your performance on early questions influences the difficulty of later ones. Reading comprehension is one of the most weighted sections and it tends to surprise people who overprepare for the science portions. The questions aren't just factual recall—they ask you to interpret passages, identify main ideas, and draw conclusions from short academic texts. I saw plenty of students who aced the anatomy and physiology sections but bombed reading comprehension because they treated it like a science test instead of a verbal reasoning test. The math section covers arithmetic, fractions, decimals, percentages, ratios, and basic algebra. You need to be comfortable doing calculations without a calculator since the exam doesn't allow one. A common pitfall is rushing through the word problems and misreading what the question is actually asking for. I had a friend who spent so much time perfecting her conversion factors that she ran out of time on the simpler arithmetic questions. The trick is to master the easy questions fast and save your remaining minutes for the harder ones. Chemistry tends to be the most controversial section among students because the scope varies depending on which version of the exam you receive. Topics usually include atomic structure, bonding, balancing equations, and basic organic chemistry. Some candidates find the chemistry questions overly detailed while others think they're straightforward. The inconsistency comes from the fact that different testing centers may pull from slightly different question banks. My recommendation is to prepare for a broad range of general chemistry topics rather than focusing too narrowly on one area.
Get the Full Details

What Free Resources Can and Cannot Do for You
Free study guides are useful for building familiarity with the question format and identifying your weak areas, but they fall short in a few important ways. Commercial guides often include more detailed explanations for why an answer is correct or incorrect, which is where most of the actual learning happens. Free compilations tend to list answers without thorough reasoning. Another gap is that free resources rarely include full-length practice exams that accurately simulate the timing and pressure of the real test. If you only practice with short quizzes scattered across different websites, you won't build the stamina needed for the three-hour exam window. I also noticed that some free PDFs contain questions that are significantly easier than what appears on the actual exam. This can create a false sense of confidence. I personally took a few free practice quizzes and scored around 80 percent, then took a more rigorous timed practice exam and dropped to about 65 percent. The difference was mostly in the complexity of the wording and the tighter time constraints. If you use free materials, treat your scores as a lower bound rather than an accurate prediction of your performance. For the anatomy and physiology section specifically, which carries heavy weight, free resources often skip detailed muscle origin and insertion points or cardiovascular pathway questions that appear on the actual test. You might need to supplement any free guide with targeted YouTube lectures or open courseware from colleges. MIT OpenCourseWare has relevant biology and chemistry content that aligns well with the HESI scope. It's not specifically designed for this exam, but the foundational knowledge overlaps substantially and it's completely free.
A Practical Approach Using Free Materials
The most efficient way to use free HESI study resources is to start with a diagnostic assessment to see where you stand. Most free guides include sample questions that can serve this purpose. Take them under timed conditions to get a realistic baseline. After that, focus your study sessions on your lowest-scoring sections first. I typically spent about two hours per day splitting my time between my weakest area and rotating through the others. The reading comprehension and math sections generally require consistent daily practice rather than cramming. Keep a log of every question you get wrong and note whether it was a content gap, a misread question, or a timing issue. This distinction matters more than most students realize. Content gaps can be fixed with targeted review, misread questions improve with slower pacing, and timing issues require faster fundamental skills. I tracked about forty wrong answers across my study period and roughly half of them were timing-related, which changed how I approached my practice sessions entirely. When you feel ready, take at least one full-length practice exam under conditions that mirror the actual test. No phone, no breaks, no looking up answers. This alone will tell you whether you're prepared or whether you still have significant gaps to address. Free resources won't give you everything you need, but they'll cover enough of the material if you use them strategically and verify their accuracy before committing to them as your primary study tool.