Study smart. Score higher. Succeed.
Raise your SAT score with a course built around real test patterns
Text-based lessons covering every domain tested on the digital SAT, with instant, fully-explained feedback on every practice question — plus full-length practice tests you can take on your own schedule.
8 full lessons free — Desmos shortcuts, punctuation tricks, and the real practice questions. No account, no card.
Linear Equations in One & Two Variables
Quick checkIf 3x − 7 = 2x + 5, what is the value of x?
Correct. Subtract 2x from both sides to get x − 7 = 5, then add 7: x = 12.
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Try it before you pay a cent
Three tabs, three parts of the course. Learn a shortcut that eliminates two answers on sight, watch the calculator do the algebra for you, and take on the questions that actually decide a score.
Takes about two minutes · 8 full lessons also free
Try today's question
A new practice question every day, free — no account needed.
A data set has values 3, 7, 7, 9, 14. Which statement is true?
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What's in the course
46 lessons across 10 modules, organized around the digital SAT’s actual content domains — plus a 3,566-question bank you can filter by domain, difficulty, and question type. Tap a module to preview its lessons.
Math
- 1
Linear Equations in One & Two Variables
Solve, rearrange, and interpret the equations that anchor the entire Math section.
- 2
Linear Functions
Read slope and intercept as real-world quantities, not just numbers in an equation.
- 3
Systems of Two Linear Equations
Choose substitution, elimination, or the graphing calculator — whichever is fastest for the setup you're given.
- 4
Linear Inequalities
Master the one rule that generates most wrong answers: when the sign flips, and when it doesn't.
- 5
Modeling with Linear Relationships
Translate messy real-world descriptions into equations you can actually solve.
- 1
Equivalent Expressions
Factor, expand, and simplify with the specific patterns the SAT reuses constantly.
- 2
Quadratic Functions
Move fluently between standard, factored, and vertex form — each answers a different question instantly.
- 3
Exponentials, Radicals & Growth
Recognize when a situation is exponential rather than linear, and read growth factors correctly.
- 4
Nonlinear Systems & Function Behavior
Handle systems where one equation curves, and use identities to skip heavy algebra.
- 1
Ratios, Rates & Proportions
Set up proportions that can't be reversed, and handle unit conversion without losing track.
- 2
Percentages & Percent Change
Handle successive changes, reverse percentages, and the traps built into each.
- 3
One-Variable Data: Center & Spread
Reason about mean, median, and standard deviation without heavy computation.
- 4
Two-Variable Data & Models
Interpret lines of best fit, residuals, and the difference between association and causation.
- 5
Probability, Sampling & Study Design
Compute conditional probabilities and evaluate what a study can legitimately conclude.
- 1
Lines, Angles & Triangles
Use angle relationships and similarity to find lengths the problem never gives you directly.
- 2
Right Triangles & Trigonometry
Apply SOH-CAH-TOA and the special triangles without second-guessing which ratio to use.
- 3
Circles
Move between a circle's equation and its geometry, and handle arcs and sectors as fractions.
- 4
Area, Surface Area & Volume
Apply the reference-sheet formulas correctly, including how scaling changes each measure.
Reading & Writing
- 1
Words in Context
Predict the missing word before you look at the choices — the single highest-value habit on this question type.
- 2
Text Structure & Purpose
Describe what a sentence does in an argument, not just what it says.
- 3
Cross-Text Connections
Compare two short texts and pinpoint exactly where and how they disagree.
- 1
Central Ideas & Details
Find the claim that covers the whole passage — no more and no less.
- 2
Command of Evidence: Textual
Identify precisely which finding would support or weaken a specific stated claim.
- 3
Command of Evidence: Quantitative
Read a table or graph and select the data that actually supports the stated claim.
- 4
Inferences
Complete a passage with the conclusion it logically forces — never with outside knowledge.
- 1
Rhetorical Synthesis
Use bulleted notes to accomplish one specific stated goal — the goal decides everything.
- 2
Transitions
Determine the logical relationship between two sentences before considering any transition word.
- 1
Boundaries: Punctuation & Sentence Structure
Decide what can join two clauses by testing whether each side stands alone.
- 2
Form, Structure & Sense
Match verbs to their real subjects, keep tenses consistent, and attach modifiers to the right noun.
Desmos Mastery
- 1
Systems of Equations
Any time you're given two equations and asked for a solution, an intersection, or a combination like a + b. It works for nonlinear systems too — a line meeting a parabola is the same procedure.
- 2
Quadratic Equations
Any equation set equal to zero. Especially valuable when the quadratic doesn't factor cleanly, where graphing beats the quadratic formula on both speed and accuracy.
- 3
Vertex of a Parabola
Any question asking for a maximum, a minimum, the vertex, or the axis of symmetry — including word problems about peak height, maximum profit, or minimum cost.
- 4
Line of Best Fit
Any question with a scatterplot or a data table that asks for a line of best fit, a predicted value, or the meaning of a slope in context.
- 5
Exponential Growth & Regression
Any scenario that doubles, halves, or changes by a percentage over equal intervals — and any data set that curves upward rather than following a straight line.
- 6
Inequalities & Solution Regions
Any system of inequalities, or any question asking which ordered pair satisfies a set of constraints. Shading removes the need to test each choice by hand.
- 7
Equivalent Expressions
Whenever you've simplified an expression and want to confirm it, or when a question asks which of four expressions is equivalent to a given one. Graph both and see whether they coincide.
- 8
Roots & Solutions of Any Function
Any equation you can set to zero, including cubics and equations that resist factoring. It also answers 'how many real solutions' questions by counting crossings.
- 9
Parameter Questions with Sliders
Any question containing an unknown constant — 'for what value of k', 'which must be true about a', or questions about how a graph shifts when a coefficient changes.
Practice Tests
- 1
How the Adaptive Format Works
Understand section-adaptive routing and why the first module of each section matters most.
- 2
Pacing & Timing Strategy
Build per-question time budgets and a reliable rule for when to guess and move on.
- 3
Desmos Calculator & Reference Sheet
Know exactly which questions the built-in tools speed up — and which they slow down.
- 4
Answer Trap Patterns
Name the handful of predictable traps that most wrong answer choices are built from.
- 5
Diagnostic Test (Full-Length, Timed)
Establish an honest baseline score and a ranked list of your weakest content domains.
- 6
How to Review a Practice Test
Turn missed questions into a targeted study plan instead of just re-reading explanations.
- 7
Full Practice Test 1 (Timed)
Retake a full adaptive test after content work and measure domain-level improvement.
- 8
Full Practice Test 2 (Final Rehearsal)
Run a final full-length rehearsal close to test day under exact test-day conditions.
Everything you need, nothing you don’t
A 3,566-question bank
Filter by domain, difficulty, format, and question type, then drill exactly the thing you keep missing. Every question carries a full explanation.
Every answer, explained
Not just the correct one — every choice in every question has its own explanation of why it's right or specifically why it's wrong.
Desmos Mastery
Nine calculator techniques that turn multi-step algebra into a few seconds of typing. The graphing calculator ships with the test and most students barely touch it.
Your mistakes, banked automatically
Every question you miss is saved with its explanation and tagged with why you missed it. Filter to “every Algebra mistake I've ever made” and study from your own history.
5 full-length timed tests
Built in the digital SAT's module structure. Two are guided, with hints and a walkthrough as you go; three run under exam conditions with nothing but the clock.
One payment, no subscription
Pay once and keep access to every module, lesson, practice test, and question in the bank. Nothing renews, nothing expires.