10 video lessons
SAT Desmos Course
Ten short narrated lessons on using the Desmos graphing calculator built into the digital SAT: solving equations, systems, sliders for unknown constants, regression and more. Each lesson has 10 practice questions.
All 10 Lessons
Every lesson has a narrated video, a written lesson and 10 practice questions. Each description says when to use that lesson on the test.
- Lesson 1Free · 1:17Solve any single-variable equationAny “what is the value of x” question, however ugly. Never do the algebra.
- Lesson 20:56Systems of equationsTwo equations, two unknowns, or any question about how many solutions a system has.
- Lesson 30:48Sliders for unknown constants“For what value of k does the system have exactly one solution?” and every variation of it.
- Lesson 43:22Regression: the constant-finderAnything that gives you points or values and asks for the constants in a function. This is the highest-value topic on the test.
- Lesson 50:54Turn an entire system into one regressionTwo or more equations sharing unknowns, especially when the unknowns aren’t x and y, so there’s nothing to graph. The most underused technique in the calculator.
- Lesson 60:52Inequalities and shaded regions“Which point could be a solution,” systems of inequalities and constrained max/min problems.
- Lesson 70:46Statistics from listsMean, median, range, total, standard deviation, and “what score do I need to average X?”
- Lesson 81:00Trigonometry and the unit circleTrig values, quadrant signs, identities and circle equations: the only geometry where Desmos genuinely helps.
- Lesson 91:01PercentagesAny percent question: discounts, tax, markups, percent change and growth.
- Lesson 100:52Brute forceWhen you can’t see the path. Testing every answer choice in Desmos is faster than finding the elegant solution.
Common Questions
How many lessons are in the SAT Desmos Course?
10 narrated video lessons, about 12 minutes of video in total, with 100 practice questions.
Is the SAT Desmos Course free?
Lesson 1 is free with no account. The other lessons open for members, and every plan starts with a 3-day free trial.
What topics does it cover?
Solve any single-variable equation, Systems of equations, Sliders for unknown constants, Regression: the constant-finder, Turn an entire system into one regression, Inequalities and shaded regions, Statistics from lists, Trigonometry and the unit circle, Percentages, Brute force.
Are the practice questions official?
They are SAT-style practice questions written for each Desmos technique. For official questions, use the SAT Math practice page, where Desmos is one click away.
How long is each lesson?
The videos run about 1:11 on average, followed by the written lesson and 10 practice questions.
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