The TEAS test is moderately difficult, and most students don’t score as high as they expect to. The national average composite score sits around 62.6%, which means the typical test-taker is getting roughly a third of scored questions wrong. That gap between expectation and reality is what catches people off guard. The test isn’t designed to be impossible, but it covers a wide range of academic subjects, and the science section in particular demands real preparation.
What the Test Actually Covers
The TEAS (Test of Essential Academic Skills) has four sections: Reading, Math, Science, and English & Language Usage. You’ll answer 170 questions in about three and a half hours, with an additional 20 unscored questions mixed in that ATI uses for future test development. You won’t know which questions are unscored, so you need to treat every one seriously.
Here’s how the time and questions break down:
- Science: 44 scored questions, 60 minutes, 29% of the test
- Reading: 39 scored questions, 55 minutes, 26% of the test
- Math: 34 scored questions, 57 minutes, 23% of the test
- English & Language Usage: 33 scored questions, 37 minutes, 22% of the test
Science carries the most weight and gets the most questions. That’s not a coincidence. It’s also the section students struggle with the most.
Why the Science Section Trips People Up
The science portion covers human anatomy and physiology, biology, chemistry, and scientific reasoning. The anatomy content alone spans nearly every organ system: cardiovascular, respiratory, digestive, nervous, muscular, reproductive, skeletal, immune, endocrine, urinary, and integumentary (skin). You’re expected to know how these systems function, not just what they’re called.
For example, you might need to understand how the heart contracts during systole and diastole, what different types of white blood cells do, or which hormones the digestive system releases and why. The reproductive system questions cover specific structures in both male and female anatomy. The skeletal system section expects you to know the difference between bone cell types that build bone versus those that break it down.
Beyond anatomy, you’ll face genetics questions covering DNA, cell division, dominant and recessive traits, and how genotype relates to phenotype. Chemistry topics include the periodic table, types of chemical bonds, the pH scale, states of matter, and properties like density and specific heat. If you haven’t taken a biology or chemistry course recently, this section will feel like a wall.
What Makes Math and Reading Tricky
The math section tests arithmetic, algebra, measurement, and data interpretation. None of the individual concepts are advanced, but you can’t use a calculator on the TEAS, which slows down students who’ve relied on one for years. Converting fractions, working with percentages, and solving word problems by hand requires practice if those skills have gone rusty. You get 57 minutes for 34 scored questions, which is generous, but only if you’re confident with the basics.
Reading is often considered the most approachable section, but it’s not a freebie. You’ll analyze passages, identify main ideas, distinguish between fact and opinion, and interpret data from charts or graphs. The challenge is pacing. With 39 scored questions in 55 minutes, you’re spending less than 90 seconds per question while also reading passages carefully enough to answer accurately.
The English Section Moves Fast
English & Language Usage has the tightest time constraint: 33 scored questions in just 37 minutes. It tests grammar rules like subject-verb agreement, correct pronoun usage, and verb tenses. You’ll need to identify sentence fragments, fix run-on sentences, and catch dangling modifiers. Punctuation questions focus on commas, semicolons, and quotation marks. There’s also a vocabulary component where you determine word meanings from roots, prefixes, and suffixes.
One area that surprises students is audience awareness. You may be asked whether a passage uses language appropriate for a formal versus informal context, or how to restructure writing for clarity and conciseness. If you read regularly and write well, this section is manageable. If grammar rules were never your strength, the time pressure makes it harder to reason through each question.
Question Formats Add a Layer of Difficulty
The TEAS isn’t all standard multiple choice. Version 7 includes four alternate question types that can throw you off if you’re not expecting them. Multiple-select questions give you four or more answer options where more than one is correct. Supply-answer questions are fill-in-the-blank with no choices at all. Hot-spot questions show an image with clickable areas, and you have to select the right region. Ordered-response questions require you to drag items into the correct sequence.
These formats are harder than traditional multiple choice because you can’t use process of elimination the same way. With a fill-in-the-blank question, you either know the answer or you don’t. Practicing with these formats beforehand makes a real difference.
What Score You Actually Need
This is where difficulty becomes personal. The national average is around 62.6%, but most nursing programs require significantly more than that. Minimum score requirements vary widely by school and program type. Some BSN programs set their floor at 70 to 75%, while more competitive programs require 80% or higher. The most selective schools publish averages in the high 80s and low 90s. California State University, Sacramento, for instance, reports an average admitted TEAS score of 92.5%, with a minimum of 91%. Cal State Long Beach requires 90%.
Even programs with lower minimums are competitive. A school that lists a 72% minimum may actually admit students scoring in the low 80s because applicants are ranked against each other. Your target score should be well above whatever minimum your program publishes.
How Long You Should Prepare
ATI, the company that administers the TEAS, recommends at least six weeks of preparation. A realistic schedule is one to two hours of focused study, three times per week. That adds up to roughly 18 to 36 hours total, which is enough for students who have a solid academic foundation and just need to review. If you’re starting from scratch on anatomy or haven’t done math without a calculator in years, plan for more.
The most effective approach is taking a diagnostic practice test first, identifying your weakest section, and spending the majority of your study time there. Students who spread their preparation evenly across all four sections often waste time reviewing material they already know while neglecting the areas that would actually raise their score.
How the TEAS Compares to the HESI A2
If your nursing program accepts either the TEAS or the HESI A2, you might wonder which is easier. The TEAS follows a standardized format where every student takes the same sections in the same order. The HESI A2 is customizable, meaning schools choose which sections to include. That makes the HESI’s difficulty variable depending on the program.
Students with strong science backgrounds tend to find the TEAS manageable because its broader coverage plays to general academic strength. Students who prefer to focus on fewer, targeted subjects sometimes find the HESI format more comfortable. Neither test is objectively easier. The better choice depends on your strengths and which exam your preferred programs accept.
Retaking the TEAS
If you test through ATI directly, you must wait at least 14 days between attempts. Individual nursing programs may impose stricter limits, including caps on how many times you can retake the exam within a given period. Some schools only accept your first score, while others take your highest. Check your specific program’s retake policy before scheduling, because a rushed retake without enough additional preparation usually doesn’t move the needle much.