3x − 7
=2x + 5
− 2x
x − 7
=5
+ 7
x
=12
Math
Algebra
Linear equations, functions, systems, and inequalities — roughly 35% of the Math section and the domain that rewards practice most reliably.
5 lessons5h70 questions
Free demo — no account needed
Takeadiveintowhat'sinside — free.
Interactive Desmos demos you control step by step, live SAT questions with hints and explanations, and 10 vocab cards you can flip. Everything on this page is exactly what's inside the paid course — just a smaller slice of it.
Animated Desmos lab 8 course domains Real SAT questions Vocab flashcards
01The floor plan
Drive the calculator yourself
Nothing plays on its own. Press Next step, drag the tracer and the sliders with your own hand, then answer the question at the end — the exact workflow you'd use on test day.
Switch demo — tap any one
Inside the course every domain gets its own lab — Algebra, Advanced Math, Geometry & Trigonometry, and Problem-Solving & Data Analysis.
What you type into Desmos
1y = 0.5x² − 2
Step 1 — type the curve
y = 0.5x² − 2 is on screen. Desmos graphs as you type; you never rearrange anything.
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02Desmos Mastery
The Desmos course: turn 3-minute algebra into a 12-second click
Desmos Mastery is a full 9-lesson track bundled free with the course. Every lesson is one screen, one workflow, and a timed before/after — these are three real lessons pulled straight out of it.
Desmos Mastery — 42+ timed workflows, bundled free
≈ 12 seconds
Function transformations
Type f, type g, define h = f(x) + g(x), then click the x-intercept.
- 🔑 Never combine like terms by hand — Desmos will build the combined function for you.
- ⚖️ Any "x-intercept / zero / solution" question is a click on the graph, not algebra.
- ✅ The grey dot Desmos snaps to IS the answer: (−12, 0) → x = −12.
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You've seen 3 of 42+ timed Desmos workflows — here's what unlocks with the full course
The free demo shows three workflows. The full Desmos Mastery track is 9 lessons, 42+ timed workflows, full regressions for every curve type, and a drill set for each one — bundled free when you enroll.
- Systems of equations — one graph, two clicks
- Inequality regions and "which point satisfies both"
- Vertex, max, min and axis of symmetry by tracer
- Exponential growth, decay and half-life models
- sin / cos identities and complementary angles
- Absolute value and extraneous-solution traps
- Statistics: mean, median, standard deviation
- Table-to-equation matching in every domain
- Polynomial zeros, intercepts and turning points
- Rational functions and asymptote shortcuts
- Sequences, scatterplots and best-fit lines
- Keyboard shortcuts that save 4+ minutes a module
03What's in the course
All eight domains, with the visual that teaches each one
This is the structure of the paid course — eight domains, each built around an animated visual model, with lesson counts and question counts you can expand.
Math
Advanced Math
Equivalent expressions, quadratics, exponentials, and nonlinear systems — the other ~35% of Math, and where higher scores are won.
4 lessons4h49 questions
$100
× 1.20
$120
× 0.80
$96
Math
Problem-Solving & Data Analysis
Ratios, percentages, statistics, probability, and study design — about 15% of Math, and the domain most tied to real contexts.
5 lessons4h44 questions
Math
Geometry & Trigonometry
Angles, triangles, circles, volume, and right-triangle trig — about 15% of Math, with a reference sheet provided on test day.
4 lessons3h32 questions
4 h light
6.2
12 h light
16.4
16 h light
16.7
Beyond 12 hours, extra light barely helps → the data supports the claim.
Reading & Writing
Information & Ideas
Central ideas, textual and quantitative evidence, and logical inference — about 26% of the Reading & Writing section.
4 lessons3h23 questions
yield
to produce — The experiment yielded clear results.
to give way — She refused to yield to pressure.
the amount produced — The yield doubled after 1990.
Reading & Writing
Craft & Structure
Vocabulary in context, rhetorical purpose, and comparing paired texts — about 28% of the Reading & Writing section.
3 lessons2h24 questions
Collisions fell on the newly lit stretch of road.
?
They fell nearly as much on the unlit stretch used for comparison.
Therefore,Similarly,However,
Reading & Writing
Expression of Ideas
Rhetorical synthesis and transitions — about 20% of the Reading & Writing section, and among the most learnable question types.
2 lessons1h11 questions
Cover one half — is what's left a sentence?
Bioluminescence has evolved independently more than forty times
a whole sentence
it appears in bacteria, fungi, insects and squid
a whole sentence
;,:
Reading & Writing
Standard English Conventions
Punctuation, sentence boundaries, agreement, and modifiers — about 26% of Reading & Writing and the most rule-governed material on the test.
4 lessons3h30 questions
04Real questions
Answer a real question right now
Same layout as the paid bank: passage on the left, question on the right, a hint button that teaches the trick without giving away the answer, and a bulleted explanation afterward.
Reading & WritingTransitionsHard
When self-checkout kiosks first spread through grocery chains, economists widely predicted a steep drop in cashier employment. A 2023 study of 1,400 stores, ______ found that cashier headcount had barely changed: managers had reassigned staff to floor support and order fulfillment rather than eliminating positions.
Which choice completes the text with the most logical transition?
05Open the wrong answers
Every wrong answer is a mistake someone actually makes
Tap any choice to see why it's there. The traps are labelled — that's how the explanations work inside the course, so you stop losing points to the same three habits.
Words in contextHard
In her memoir, the diplomat describes negotiations that dragged on for months without visible progress. Yet she insists the delay served a purpose: each side needed time to abandon positions it had adopted for domestic audiences rather than out of genuine conviction. The apparent stalemate, she writes, was ______ — a necessary interval during which unrealistic demands quietly expired.
Which choice completes the text with the most logical and precise word or phrase?
0 of 4 read.
06Vocab deck
Flip ten cards, free
Ten sample cards here, drawn from the 384-card deck inside the course — every word chosen because it actually repeats on the Digital SAT.
Tap the card to flip · card 1 of 10 free samples
The full deck inside the course has all 384 cards.
07What it costs
One hour with a tutor costs more than all of this.
Same content, no scheduling, no hourly meter. Pay once and the whole course — every lesson, question, flashcard and future update — stays yours.
Private SAT tutor
$100+
per hour — one hour already costs more than this entire course
Prep classes
$300+
per course — and it expires when the class ends
SAT Monster
Limited time$89.99$149.99
one payment · keep it forever
08Before you decide
The things people ask
Short answers, no sales pitch.
Yes — only the digital SAT. Every question uses the current formats, the practice tests are built in the real module structure, and there's a whole section on the Desmos calculator that ships with the test. Nothing here is left over from the paper exam.
Before the full slice
The Boundaries Playbook — free lesson + quiz.
Grammar & punctuation — periods, semicolons, colons, commas and dashes — then 6 real questions with hints and full explanations.
6 rules, taught visually Rapid-fire drill 6-question quiz Hints on every question
Grab a notebook first — take notes on each rule as you go.
That was a slice. The full course has the rest.
- 5,600+ real practice questions with hints
- Animated lessons across every domain
- Full Desmos Mastery track (9 lessons)
- Jerry — your 24/7 AI tutor
- Timed practices with real pacing
- 384 vocab cards + XP progress
Get the full course — $89.99 $149.99 · Desmos + Jerry bundled free