Every question here shows the rule, the shortcut, and exactly why each wrong answer was engineered to catch you. Not a hint. Not an answer key. The actual reasoning, on every single question.
Because knowing why an answer is right is the only thing that makes a score repeat on test day. Everything else is a student who got lucky once.
Most courses are built for the middle of the distribution, where the questions are ordinary and progress is easy to show. That is a comfortable place to build a product and a useless place to build a ceiling. Everything here is curated against a single target, and every decision in it was made by asking one question: does this help a student clear 1500?
It is a floor rather than a promise. A student who starts at 1050 with six weeks will be told so, plainly, by the plan itself. But the material is not the constraint — nothing in here was written for a 1200 and then padded out.
Switch between them whenever you like — your progress is kept separately.
Three steps, in this order. The first two take an evening — the third one is the whole method.
Only the third one repeats. That is the part every other course leaves to you, and the part this one measures: what you missed, when it comes back, and whether it stayed fixed.
Four numbers, a straight answer — and it is already answered on the right.
Most courses will sell you a plan. This one will tell you when the plan cannot work. Put in the weeks you actually have, the hours you can actually give it and the distance you are trying to cover, and it returns the arithmetic: how many hours that adds up to, whether a full pass through the course fits inside them, and where the score realistically lands. It can say no, and it does — six weeks at four hours for a 300-point jump comes back as a refusal with the numbers behind it, because a planner that only ever agrees with you is a sales page with a form on it.
156 hours is a full pass with 86 to spare, and a full pass from 1250 is worth about 270 points on the conservative end. Start now rather than in a month.
How the weeks divide
A guide, not a prediction. Nobody can compute a score from four numbers — the diagnostic replaces the guess with your own per-skill results, and the plan is rebuilt from those.
On screen for every Math question. Used properly it takes the algebra out of about a third of them — and almost nobody is taught how.
Grouped by what you would use it for — and every one of them opens.
Twelve numbers on twelve cards is what every course on this page prints. So each of these opens onto the real thing: the grammar rule is a rule from the course, the worked example is worked the way the course works it, and where it is interactive in the app it is interactive here. Open one before you decide anything.
Learn the material
Every rule is shown wrong first, because the wrong version is the one that looks right in the exam.
The data was inconclusive, the study was repeated.
The data was inconclusive; the study was repeated.
The data was inconclusive, so the study was repeated.
The rule. Both halves are complete sentences. A comma on its own cannot join two complete sentences — it needs a semicolon, or a comma plus a joining word. This is the single most tested punctuation rule on the exam and it appears in some form on nearly every form.
Inference questions are not about opinion. Every right answer is the one the text can be held to.
The committee’s report ran to four hundred pages, and its recommendations were adopted within a month. Observers noted that not one member had asked for more time.
Which choice is most strongly supported by the second sentence?
One worked example per skill, and the reasoning for each line sits beside it rather than under the whole thing.
A line passes through (2, 7) and (6, 19). What is its equation?
Find the slope first. It is the only thing both points agree about.
m = (19 − 7) / (6 − 2) = 12 / 4 = 3
Put one point back in. Either point — if they disagree, the slope is wrong.
7 = 3(2) + b, so b = 1
Write it out. The question asked for the equation, not for the slope.
y = 3x + 1
Three lines, and the last one is the one students skip: the question asked for the equation. Answering 3 is answering a question nobody asked.
The reference sheet is given to you in the exam. What matters is the list it leaves out.
The trap. The sheet gives you the volume of a cone and not the slope of a line. Students lose questions memorising the half they were handed and arriving without the half they were not.
Build the reflexes
One decision per rep, against the clock. Thirty reps in three minutes is the point — reading about the rule is not the same as having it.
The committee released findings on Tuesday.
Nothing is a fixed set. Pick the domain and the difficulty and the pool is built from what is left.
Two questions that differ by one thing. If you can only answer one of them, you were pattern-matching.
If 3x + 2 = 14, what is x + 2?
x = 4, so x + 2 = 6
If 3x + 2 = 14, what is 3x?
3x = 12 — and you never need x at all
One change, and the work changes. The same first line, and B is finished a step earlier than A. Students solve for x out of habit and answer 4 to both. The pair is the only way to catch that in yourself — a single question lets you get it right for the wrong reason.
Formulas drawn rather than written, with the variable in your hand. Drag the radius and watch which one grows faster.
Double the radius and the circumference doubles while the area quadruples. That is a sentence in a textbook and a fact in your hands.
Measure and improve
Built to the published blueprint, including the part that catches people out: the second module is chosen by how the first one went.
Why the second module matters. Do well in the first and the second is harder and worth more; do badly and the second caps what you can score. A practice test that does not do this cannot tell you your score, and most do not.
A question you missed does not go away. It comes back tomorrow, then in three days, then in a week — and the gap only widens while you keep getting it right.
A question you got wrong: “Neither of the proposals has enough funding” — why singular?
Right four times running and it stops asking. Miss it once and it goes back to tomorrow — which is the whole point, and the reason a list of mistakes is not the same as a review queue.
The planner takes four numbers and tells you where the path lands — and it will tell you when the answer is no.
The builder is live further up this page, in section 03. Nothing is sent anywhere and nothing is charged — the arithmetic runs in your browser.
A 1500 is not a different kind of student. It is nine questions across two hours — and knowing which nine is the whole subject.
Nine misses, in all
Which is why the last sixty points are not more hours. They are the three you do not know, found and named, and the two careless ones made impossible.
Why this number earns the hours you are about to put into it.
A test score is the only line on an application that is bought with practice rather than with years. It is also the only one a university will exchange directly for money. Before a student gives up their evenings for a season, it is worth being precise about what they are buying.
Most public universities publish a merit grid: a score band and a GPA map to a dollar figure, renewed for four years. The grid does not interview you and does not care who you know. Moving up one band is, at many schools, worth more than a part-time job across the whole degree.
A band is worth more per hour than almost any other work a teenager can doA GPA is the average of three years and barely moves. A score is one morning, and it can move two hundred points in a season. In the autumn of senior year it is usually the only variable still genuinely in a student's hands.
Three years of transcript, or ten weeks of deliberate workOptional means a strong score still helps and a weak one is simply withheld. Honors colleges, direct-admit majors, and most merit money kept their score requirements even where admission dropped them. Submitting a high score is a free option; you only exercise it when it helps.
The downside of a high score is zero, by constructionYou cannot retake junior year. You can retake this, and most universities superscore — taking your best Reading & Writing and your best Math from different sittings. That turns one exam into a series of attempts at one number.
Superscoring makes every sitting a floor, never a ceilingSomewhere along the way, test preparation stopped being about teaching. A family pays for access and quietly receives no instruction at all — a login, a question bank, and a bill. The student is left to infer the reasoning that nobody wrote down.
We built the opposite, and we were deliberate about it. Every question is worked line by line. Every wrong choice is named and taken apart. Every rule is proved with an example beside a counter-example. When the system does not know something, it says so.
No recycled banks. No cancelled sessions.
No promises we cannot stand behind.
What we refused to build
What we built instead
Four lengths, one price list, nothing held back for a higher tier — and the first fifteen days are refundable in full. If you would rather look first, build a study plan or sit the free diagnostic.
The six that come up before anyone pays for anything.
For most students, ten to sixteen weeks at five or six focused hours a week. The variable is not talent, it is whether the hours are spent on the skills actually losing points — which is the entire reason the diagnostic refuses to give you a score and names skills instead.
It is shorter and adaptive, not easier. The second module's difficulty is chosen by how you did on the first, so the top of the scale is reached by performing on hard questions rather than by grinding through volume. That is why the hard tier here is the deepest one.
Take a timed section of each and compare percentiles, not raw scores. The ACT gives less time per question and includes a science-reasoning section; the SAT gives more room to think and leans harder on reading. Every university that accepts one accepts the other, with no preference.
Optional applies to admission, not to money. Honors colleges, direct-admit programs and merit grids largely kept their score requirements. A strong score is a free option — it helps when submitted and costs nothing when withheld.
Most universities take your best Reading & Writing from one sitting and your best Math from another. It means a first sitting can only ever set a floor, so the sensible plan is to sit early, learn what the real exam feels like, and treat the next one as the attempt that counts.
Every one of the 4,495 questions carries the full reasoning — the rule, the shortcut, and why each wrong answer was engineered. No session can be cancelled, nothing is gated behind a tutor's calendar, and the system will tell you when a target is unrealistic rather than quietly taking another payment.
Every question explained in full — the rule, the shortcut, and why each wrong answer was written to catch you. Built for students, not for billing hours.
The same course, the same explanations, wherever a student sits it.
SAT® and PSAT/NMSQT® are trademarks registered by the College Board, and ACT® is a registered trademark of ACT, Inc. Neither organisation endorses, sponsors or is affiliated with this course, and neither was involved in producing it. Score bands, percentiles and ACT equivalents are drawn from the published concordance and from institutions’ own scholarship tables; they move slightly from year to year and from one university to another, so treat every figure here as a guide and confirm the current one with the institution before making a decision on it. No particular score is promised: the only outcome commitment we make is the Completion Standard, whose conditions are set out in full on the Course process page, and it is a commitment to extend access or refund the fee — never a prediction of a result.