About
About Learn Desmos
Learn Desmos teaches one thing well: how to use the Desmos graphing calculator on SAT Math questions, fast enough that it changes how you take the test. This page explains who the course is for, how it works, and who is behind it.
Last updated: September 5, 2026
Who it is for
Students preparing for the SAT who want the calculator to carry more of the load. Two students in particular: the one who has never opened Desmos and types the letter x for multiplication, and the one who uses it every day but still solves hard questions by hand because the calculator never seems to help with those.
The course starts from the first lesson's typing rules and ends with a framework for questions nobody has shown you before. If you are chasing a top Math score, the Regression section is where most of the leverage is. If you mainly want to stop losing points to arithmetic, the Prerequisites section alone will help.
The method: watch, rebuild, prove
Every one of the 27 chapters runs the same way. First you watch a short video in which the method is performed once, keystroke by keystroke. Then you rebuild it yourself in a live Desmos graphing calculator embedded in the page. The course checks your calculator, not a multiple-choice answer, so typed with an equals sign where the tilde should be is caught on the spot.
In the Graphing and Regression sections you then prove the method on four original, hard SAT-style questions against a timer. Only when all four are done does the next chapter unlock. The 12 Prerequisites chapters stop after the rebuild, because they teach the calculator itself rather than a question type.
The idea underneath all of it is stated plainly in the final chapter: meet every condition the question states, then type in what is asked and read the answer.
Who built it
Learn Desmos was built by Kabbier Daga, who scored 800 on SAT Math, and it teaches the way the calculator was actually used to get there. It is a one-person project.
That also means it is opinionated. The course tells you which menu items to ignore, which values never to give a constant, and when the graph beats regression. Where a method breaks, the chapter says so and shows the fallback.
How the questions are made
Every practice question in the course is original. None is copied from a released test or any other source. Each one is written for a specific chapter with a stated reason for being hard, then checked by a computer algebra system that confirms the answer key, then reviewed a second time for ambiguity, traps and wrong answer choices that could accidentally be right.
A question that fails any of those checks is not published. Multiple-choice questions have exactly one correct choice, and student-produced responses accept every mathematically equivalent form in the permitted formats. Each question ships with a full explanation and the fast Desmos route, so a wrong answer teaches something.
Free, with no ads and no tracking
The course is free. There is no advertising, no third-party marketing or behavioral tracking code, and no personal data is sold, rented or traded.
The site collects an email address so you can have an account, and it records what you have worked through so it can show you your own progress and put you back where you left off. A display name and an intended SAT date are optional. No date of birth is asked for, and the course is intended for students aged 13 and over. The site's privacy policy page spells all of this out field by field.
Independence
Learn Desmos is an independent resource. It is not affiliated with, sponsored by, or endorsed by College Board or by Desmos. The SAT, Bluebook and Desmos names are used only to describe what the course covers, and no logos or brand assets appear on the site.
The coverage figure on the landing page, an estimated 53.55% of SAT Math question types (the curriculum's own estimate: Graphing 25.24% + Regression 28.31%), describes the question types the method addresses. It is not a score prediction, and nothing on this site guarantees any result. The FAQ explains the figure in more detail.
Contact
Email info@learndesmos.com for anything: a question that looks wrong, a video that will not play, an idea for a chapter. Reports that include the chapter name and what you typed get fixed fastest.
If you are ready to start, the curriculum page lists every chapter, and a free account opens the first one straight away.