SAT Math Practice
Three modes of free Digital SAT Math practice, each built around a different question: which mistakes are costing me points, can I fix one specific mistake pattern, and can I produce the answer with no choices to lean on. No account needed. Progress saves locally in your browser.
Mode 01
Diagnose
Ten-item topic diagnostics where every wrong answer is a real, named mistake pattern, not just "incorrect." Each result routes you to the specific drills that fix what tripped you up.
Start with Unit 1Mode 02
Targeted drills
Once a diagnostic flags a mistake pattern, drills hit only that one pattern with varied scenarios and feedback after every question, until you stop falling for it.
Mode 03
Grid-in
Student-produced response items with no answer choices. You type the value, and a wrong answer still maps back to the mistake that produced it, exactly like the multiple-choice items do.
Try a grid-in setPractice by unit
Six units, Digital SAT Math domains
- Unit 1Linear Reasoning (Algebra)Practice ›
- Unit 2Nonlinear Algebra (Advanced Math)Practice ›
- Unit 3Proportional Reasoning and Percentages (PSDA)Practice ›
- Unit 4Data, Statistics, and Probability (PSDA)Practice ›
- Unit 5Geometry and TrigonometryPractice ›
- Unit 6Strategy and Trap RecognitionPractice ›
Why mistake-targeted practice works
Most SAT Math points aren't lost to problems you couldn't do. They're lost to a short list of repeatable mistakes the test is engineered to exploit: a sign dropped while distributing, an inequality symbol left unflipped, a middle term missing from a squared sum, f(x) read as multiplication, and the classic trap of solving correctly and then reporting the value the question never asked for. Every distractor on the test is one of these mistakes in disguise. And roughly a quarter of the section is grid-in, with no choices to lean on at all, so you have to produce the right value cold.
That is why Mistake Master is built around diagnose then drill rather than around problem volume. Working 200 mixed practice problems with a mistake pattern intact rehearses the mistake 200 more times. Working 20 drill problems that explicitly target the pattern, with feedback after each, retires it. The fastest score gain comes from finding the two or three patterns that are costing you points and drilling exactly those.
Common questions
FAQ
Is Mistake Master free?
Yes. Every diagnostic, drill, and grid-in set is free. No account required. Your progress saves in your browser using local storage, and you can review it on the dashboard.
What is a grid-in question?
A student-produced response (SPR) item: instead of picking from four choices, you type the numeric answer yourself. About a quarter of the Digital SAT Math section is grid-in, so practicing only multiple choice leaves a gap. Our grid-in sets still map wrong values back to the specific mistake that produced them.
Where should I start?
Start with a topic diagnostic in Unit 1 (or whichever unit matches what you're studying) and let the result route you to drills. If you want to know where you stand overall first, browse all units or read about the exam format.
Is this aligned to the Digital SAT?
Yes. Units follow the Digital SAT Math domains (Algebra, Advanced Math, Problem-Solving and Data Analysis, Geometry and Trigonometry), plus a cross-cutting strategy unit, with internal mistake codes anchored to how the test actually writes its distractors. The reference page covers the test-day formula sheet and the formulas it doesn't give you.
How long does a practice session take?
A topic diagnostic takes 10 to 15 minutes. A single drill takes 5 to 10 minutes. A grid-in set takes about 10 minutes. For planning around a test date, see how hard is SAT Math and the score calculator.