Limitless Prep by Kaplan™


Discover a whole new way to prep—with drop-in style classes, brand-new 3D modeling, and an expert-recommended study plan. Your high score has never been closer.†

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We pick the very best OAT instructors who know the test inside and out—and know how to keep you engaged for your best results. The best part? With limitless drop-in style classes, you can work with them anywhere you are, at the time that suits you best.


The OAT covers a lot of ground, including two years of undergraduate science. With 3D modeling and augmented reality, you’ll be mastering content in no time. Plus, we’ll provide an expert-made study plan so you can stay focused on the content you really need to know—instead of stressing over the things you don't.


Practice helps your score, but realistic practice makes all the difference. Use the pinpointed quizzes to tackle your highest yield problems. Then find out where you really stand with our full-length, test-like practice tests. Build your confidence with prep that looks and feels like the OAT.


  • A fully revamped course experience 
  • Flexible month-by-month access length
  • 70+ hour-long, interactive sessions per month
  • Live drop-in style classes that fit your schedule
  • Augmented reality and 3D learning environments
  • Personalizable, structured study plan with calendar synching
  • 7 full-length, computer-based practice tests
  • 2000+ Survey of Natural Science and Reading Comprehension practice questions
  • 2000+ quantitative practice questions
  • The most up-to-date OAT Prep Book

Private Tutoring

Get undivided attention from tutors who scored in the top 10%.

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Free Practice Test

Experience the OAT before test day.

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Prep Book

Check out OAT Prep Plus 2021–2022 for expert strategies.

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You’ll be able to ace questions on: the origin of life, cell metabolism, photosynthesis, enzymology, cellular processes, membrane transport, signal transduction, thermodynamics, organelle structure and function, mitosis and meiosis, cell structure and function, experimental cell biology, biomolecules, biological organization, relationship of major taxa, six-kingdom, three-domain system, plantae, animalia, protista, fungi, eubacteria, bacteria, archaea, integumentary, skeletal, muscular, circulatory, lymphatic and immune, digestive, respiratory, urinary, nervous and sensory, endocrine, and reproductive systems.

Get ready to take on any questions about: fertilization, descriptive embryology, developmental mechanisms, molecular genetics, human genetics, classical genetics, chromosomal genetics, genetic technology, natural selection, population genetics/speciation, population, community ecology, ecosystems, animal behavior, social behavior, and integrated relationships.

Let us guide you through questions on: percent composition, empirical formulae, balancing equations, moles and molecular formulas, molar mass, density, calculations from balanced equations, kinetic molecular theory of gases, Dalton’s, Boyle’s, Charles’s, ideal gas law, intermolecular forces, phase changes, vapor pressure, structures, polarity, properties, colligative and non-colligative, forces, concentration calculations, pH, strength, Brønsted-Lowry reactions, and dimensional analysis calculations.

You’ll be able to defeat any questions about: Le Chatelier’s principle, precipitation, laws of thermodynamics, Hess’s law, spontaneity calculations, enthalpies, entropies, heat transfer, rate laws, activation energy, acid and base, half-life, balancing molecular equations, determination of oxidation numbers, electrochemical calculations, electrochemical concepts and terminology, electron configuration, orbital types, Lewis-Dot diagrams, atomic theory, quantum theory, molecular geometry, bond types, sub-atomic particles, representative elements, transition elements, periodic trends, descriptive chemistry, binding energy, decay processes, particles, terminology, basic techniques, equipment, error analysis, safety, and data analysis.

Worry no more, we’ll have you conquering questions on: elimination, addition, free radicals, substitution mechanisms, general, one-step, multi-step, spectroscopy, 1H NMR, 13C NMR, infrared, multi-spectra, structure, polarity, intermolecular forces, solubility, melting and boiling point, laboratory theory, techniques, TLC, separations, chirality, isomer relationships, conformations, IUPAC rules, functional groups, alkene, alkyne, substitution and elimination, aldehyde, ketone, carboxylic acids, derivatives, acidity, basicity, structure analysis, pH and pKa, prediction of products, equilibria, aromaticity, resonance, atomic and molecular orbitals, hybridization, and bond angles and lengths.

We can’t even list out all of the strategies here, that’s how many we have for tackling the subsections of this test! But you’ll get an optimized hole punching method, pattern folding shortcut that saves literal minutes, and top front end visualizations that will have you wondering how you ever tried these before. And yes, we’ve got all the floating cubes you could ask for.

You might already know that prior understanding of the science topics presented in the passages is not a prerequisite to answering the test items. But it sure helps to have 50+ passages (with full question sets) to practice with! Learn the expert-devised strategies to help you read, comprehend, and thoroughly analyze the information. Oh yeah, and get all of your points! 

It might be years since you’ve seen these topics (flashbacks of SAT, ACT), but we’ll have you making your old Algebra teacher proud! Incorporating our best-selling Quantitative Reasoning Foundations course (for free!) lets you can see these concepts from every angle (hah!). Learn test shortcuts to triumph over questions on: algebra, equations and expressions, inequalities, exponential notation, absolute value, ratios and proportions, and graphical analysis. 


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Score higher with Kaplan,
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