Your cart
Your cart is empty.
Animated MCAT course now open
Most self-paced MCAT courses are video libraries. This is an interactive course: placement diagnostics decide where you start, animated lessons teach each concept, and checkpoints make sure you can use it before you move on.
Action potential
An action potential is all-or-nothing: below −55 mV you get only a small graded depolarization that decays back to rest, and at or above −55 mV you get one spike of fixed size and duration. Stimulus strength is coded by firing frequency, never by spike amplitude.
SN2 backside attack
In one concerted step, the nucleophile attacks the carbon from directly opposite the leaving group (180°). As the C–LG bond breaks, the other three groups flip through a flat transition state like an umbrella in the wind — inverting the stereocenter (Walden inversion).
Enzyme saturation
As substrate rises, rate climbs then plateaus at Vmax — every enzyme is busy. Km is the [S] giving half-Vmax (lower Km = tighter binding). Competitive inhibitors raise Km (more substrate beats them); noncompetitive inhibitors lower Vmax (substrate can't).
Checkpoint routing
770
Interactive lessons
80
Chapters across 6 subjects
6,400+
Practice questions
74
Placement diagnostics
Sample course animations
One from each of the six subjects, and these are the real animations from inside the course. Play, pause, scrub, and drag them the same way students do, instead of watching another passive video.
Biology
Scrub through one heartbeat and read pressure, volume, and all four valve states together.
A heart valve has no motor: it opens or shuts the moment the pressure difference across it reverses. Every event in the beat is one pressure curve crossing another, which is why the two isovolumetric phases exist at all: all four valves are shut, so pressure changes fast while volume cannot change at all.
Biochemistry
Step an electron through the complexes and watch the proton gradient build and drive ATP synthase.
The electron transport chain uses energy from electrons (carried by NADH and FADH₂) to pump H⁺ across the inner mitochondrial membrane, building a proton gradient. That stored gradient drives ATP synthase like water through a turbine — chemiosmosis. O₂ is the FINAL electron acceptor, forming water.
General chemistry
Pour in base and watch pH crawl through the buffer region, then jump at equivalence.
Titrating a weak acid, the pH barely moves in the buffer region — at the half-equivalence point pH equals the pKa. Then pH leaps through the equivalence point, which lands ABOVE 7 (basic) because the product is the acid's conjugate base.
Organic chemistry
Flip the ring and watch every axial bond turn equatorial, and why bulky groups pick a side.
Cyclohexane puckers into a chair, not a flat hexagon. A ring flip converts one chair to the other, turning every axial bond into an equatorial one and back. Bulky groups prefer equatorial (axial groups suffer 1,3-diaxial strain), so the equatorial conformer is the favored one.
Physics
Speed the source up and watch the wavefronts bunch ahead of it and stretch out behind.
The source chases its own waves. Ahead of a moving source the wavefronts pile up — shorter wavelength, higher pitch; behind, they stretch out — longer wavelength, lower pitch. The source's speed sets how strong the shift is.
Behavioral sciences
Drag the criterion and watch hits and false alarms trade off against each other.
Detecting a faint signal isn't just sensitivity — it's also where you set your criterion. A liberal criterion catches more signals (more hits) but also more false alarms; a conservative one cuts both. The distance between the noise and signal curves (d′) is your true sensitivity.
The study loop
The daily experience is not "watch module 14 because it is next." The course keeps checking whether you already know it, whether you can apply it, and whether it needs to come back into review.
Start each chapter with a placement quiz so strong areas compress and weak areas get the full lesson path.
Watch mechanisms, physiology, circuits, and graphs move instead of memorizing static screenshots.
Predict, scrub, sort, label, and explain before the course reveals the answer.
Short quizzes after each sequence decide whether you move on or get routed back to the exact concept.
How it works
Every lesson is built from interactive parts designed for how memory actually works: watch a process move, predict before you reveal, sort it yourself, then prove it on a checkpoint.
Every chapter starts by finding out what you already know so you do not waste study days on familiar material.
Processes that move: action potentials, enzyme kinetics, organic mechanisms, waves, circuits, and organ systems.
Commit to an answer before the explanation appears. That is the difference between recognition and recall.
Order pathways, label diagrams, run quick calculations, and interact with the material before test day asks you to.
Short checks after every sequence decide whether you move on or get routed back to the exact weak concept.
Mastery tracking by topic, weak-concept review, and a dashboard that tells you what to study next.
Launch enrollment
Enrollment is intentionally simple: one payment for the complete course. No subscription, no tiers, nothing held back, and every lesson we add or improve is included in your enrollment.
| Feature | Free Books | The Course | 1-on-1 Tutoring |
|---|---|---|---|
| Price | Free | $499 launch enrollment | From $45/hr |
| Content review | Full reference | Full reference, taught | Targeted to your gaps |
| Knows where you should start | No | Yes, placement diagnostics | Yes, your tutor decides |
| Interactive practice built in | Chapter quizzes | Checkpoints in every lesson | Assigned by tutor |
| Tells you what to do next | No | Yes | Yes |
| Accountability | You | Structure, streaks, progress | A person who notices |
| Best for | Reference and review | Structured self-study | Stuck sections, score plateaus |
If you are deciding between the three, our guide on choosing between a course, books, and tutoring walks through it by budget, timeline, and diagnostic score. And if you need a person rather than a system, that is what our tutors are for.
Ready when you are
Launch enrollment is $499 instead of the regular $699. The placement diagnostics decide where you start; the course takes it from there.
Enroll in the MCAT courseYes. Launch enrollment is open now at $499. Enroll at checkout and your access opens immediately, starting with the placement diagnostics.
The books are the reference; the course is the training plan built on top of them. The course adds placement diagnostics that decide where you start, interactive lessons that teach each concept at three depths, checkpoint quizzes after every sequence, and a structure that tells you exactly what to do next.
Tutoring gives you a person: accountability, judgment calls, and feedback on your specific gaps. The course gives you structure at a fraction of the price. Many students do both, using the course as the daily system and a tutor for the sections that will not move.
Yes. The underlying system has over 6,400 practice questions across the six subjects, plus checkpoint quizzes inside every lesson sequence and placement diagnostics for all 74 content areas.
Launch enrollment is $499 instead of the regular $699. It is one payment for the complete course, with no subscription, and every lesson we add or improve is included in your enrollment.
