Advanced mathematics
Algebra, functions, trigonometry, statistics, and geometry — several with a graph you can move yourself.
Lessons
Theory, worked examples, common mistakes, and practice questions — some with a live, slider-driven graph.
Browse lessonsQuestion bank
Topic drills that reuse the same math you just read, untimed and with an explanation after every answer.
Browse the bankWhat the tutorials cover
Each lesson opens with the idea itself, works an example end to end, names the mistakes that actually cost people marks, and finishes with practice questions. Several carry a graph you can drive with sliders, because some of this is far easier to see than to read.
- Algebra and linear functions
- Solving and rearranging equations, slope and intercept, writing a line from two points, and reading a linear model in context.
- Quadratics and polynomials
- Factoring, the quadratic formula, vertex and standard form, and what each coefficient does to the shape of a parabola.
- Exponentials and growth
- Growth and decay, the difference between a constant rate and a constant multiplier, and how to read a half-life or doubling time off an equation.
- Trigonometry
- The unit circle, sine and cosine as functions, amplitude and period, and the right-triangle ratios the SAT and ACT lean on.
- Statistics and data
- Mean, median, and standard deviation, what each one is resistant to, and reading a distribution or a two-way table without being misled by it.
- Geometry
- The Pythagorean theorem, special right triangles, circles, and the handful of area and volume results worth memorising.
Preparing for a test date rather than a class? The SAT Math course covers the same mathematics organised by the test’s own domains and difficulty tiers, and the question bank drills each topic separately.
Questions about the tutorials
Who are these math tutorials for?
Anyone who needs the mathematics behind the SAT and ACT properly explained rather than drilled. They work as standalone tutorials for a high-school algebra, trigonometry, or statistics course, and as the underlying theory for the test-specific SAT Math course.
How is this different from the SAT Math course?
These tutorials teach the mathematics on its own terms, with more depth and interactive graphs. The SAT Math course teaches the same material in the shape the test asks about it, organised by domain and difficulty tier. If you are preparing for a test date, start with the course; if a concept has not clicked, come here.
Do the lessons include practice questions?
Yes. Every lesson ends with practice questions that have full worked explanations, and several include a live graph with sliders so you can see what changing a coefficient actually does.
What math formulas do I need to memorise?
Fewer than most students expect. The geometry lessons cover the small set worth committing to memory, and the reasoning for the rest — for anything you can derive quickly under time pressure, understanding the derivation is more reliable than memorising the result.