Loading the page
The ultimate guide to SAT mastery.
- 10 full-length practice tests to build test-day stamina and confidence
- A Desmos simulator to solve math questions faster
- 121 lessons that teach every skill the SAT tests
One payment, no subscription. The price rises to $149 at launch on October 25.
A tour of the library
Solve each question one small step at a time.
Desmos practice
Finish SAT Math with time to spare.
- Type each equation yourself, with your keyboard, as on test day.
- Each step is checked, and the graph shows what it means.
- Try the first lesson here: graph both sides and find where they cross.
It covers four skill groups: “Read a graph”, “Work with tables”, “Type with confidence”, and “Understand functions”.
Solve
What value of is the solution to the equation below?
1
Expression 1
2
Expression 2
Enter an equation to see its graph here
Step 1 · Enter
Graph the left side
Enter in input box 1. The resulting graph shows the value of the equation’s left side for each x.
Type it
- y=2x+5
Visual explanations
Understand every new term at a glance.
- Hover over or tap a key term in any lesson.
- A card opens with a drawing of the idea and a plain definition.
- Worked examples mark the exact word or number that changes.
- Grammar
independent clause
A group of words with a subject and a verb that makes sense by itself as a complete sentence.
Example"The bus was late" can stand alone.
- Math
slope
How steep a line is: how much y changes each time x goes up by 1. It is the m in y = mx + b.
Exampley = 3x + 2 rises 3 for every 1 step right.
- Reading
central idea
The main point of a whole passage: the one idea that everything else in it supports.
10 full-length practice tests
Build test-day stamina and confidence.
- Module 2 gets harder or easier from how you did on Module 1, as on the real SAT.
- Your score comes as a range, measured against College Board’s own practice tests.
- Each test runs on test‑day time: 2 hr 14 min, plus a 10‑minute break.
Test 8
1290–1370
Most likely 1330
Reading and Writing
630–690
Math
640–700
- Reading and Writing27 questions, 32 min eachModule 1Harder Module 2Easier Module 2
- 10-minute break
- Math22 questions, 35 min eachModule 1Harder Module 2Easier Module 2
Bluebook Simulator
Learn from every question you miss.
- It works like Bluebook, the app you take the SAT in, so test day feels familiar.
- Nothing extra shows during a test. The guides, the heatmap, and your results come after you submit.
After you submit
4 free questions in 7 minutes
Guided review. Work out each miss with “Guide me through this”: small questions you answer, one step at a time, until you see what went wrong.
121 lessons, every skill mapped
Find the lesson for whatever trips you up.
- 59lessonsSAT Math“I read the problem and don’t know where to start.”Know your first step on every kind of problem.Desmos MasteryAlgebra FoundationsProblem SolvingLinear Relationships+6 moreSee the SAT Math lessons
- 39lessonsSAT Reading“Two answer choices both sound right.”Spot the detail that rules out the wrong one.ComprehensionVocabularyArgument & Critical ReadingText Structure+5 moreSee the SAT Reading lessons
- 23lessonsSAT Grammar“Commas and semicolons feel like a coin flip.”Know the rule that decides each answer.Sentence StructurePunctuationTransitionsAgreement+3 moreSee the SAT Grammar lessons
- The skills the SAT tests most come first, so your time goes where the points are.
- Every lesson starts with a question for you to try.
- Search any skill and open its lesson in one step.
XP and the weekly leaderboard
Build the habits that raise your score.
- Every lesson question gives XP the moment you get it right.
- Practice tests give XP after you finish, for right answers and habits like leaving nothing blank.
- The weekly leaderboard shows each student only as a first initial and a picture they choose.
Hello, I’m
Tom Meli
SAT instructor
I’ve spent twenty years learning how to explain hard ideas so they stick.
- Teaching since
- 2006
- SAT focus since
- 2015
- My SAT as an adult
- 1550
I built Deep Test Prep to put those explanations in one place.
Read why I teach this wayP.S. I’m also working to change how students learn in high school and beyond. You can see what I’m building next at Play for Mastery.
Deep Test Prep Online Library
Preorder now. Start studying at launch.
- 10 full-length practice tests to build test-day stamina and confidence
- A step-by-step guide to every practice test question
- The Desmos simulator, to solve math questions faster
- 121 lessons that teach every skill the SAT tests
- The Bluebook Simulator, so test day feels familiar
- A drawing for every key term, so new ideas make sense at a glance
Early bird preorder
$97
One payment. No subscription.
- TodayPreorder for $97Most lessons still being written
- October 25Library opensThen $149
Already have access? Sign in