ACT Prep

(from someone who can actually explain it)

Chris is a Stanford-educated tutor with over 10 years experience tutoring math to students of all abilities and levels, from pre-algebra and middle school all the way through college algebra, calculus and the SAT. In that time he got a lot of experience learning how to explain this stuff in a way it actually makes sense to normal people, and he brings that experience to his videos, whether you are in class now or preparing for ACT.

Start Prepping Now!Sample ACT Videos

How to prep for ACT using -- The table below contains a list of all the topics you'll find on the ACT test. In the right-hand column of the table are links to all the videos on our site that you'll want to watch to cover those topics.


"I used the ACT prep page for the week leading up to my ACT. I haven’t taken a math class in a while, so these videos definitely gave me the help that I needed. I loved that the things I needed to study were there in one page. Having them there made it so much easier to find specific topics I needed to study. These videos bumped my composite score from a 19 to a 21 in literally a week!"

-Sara M.

ACT Practice Tests:

ACT practice tests -- Once the new tab opens, you'll need to enable flash. The explanations aren't great, but once you take the test with those guys, come back here to figure out how to do stuff! (that link takes you off our site)
About the test: The ACT® college entrance exam covers reading, writing, science, and math. This site will help you prepare for the math questions which cover topics from pre-algebra, algebra, geometry, algebra 2, and stats/probability. Tests are on paper at a test center and are given near the beginning of the month in April and June.
Calculators: Calculators are allowed but must meet the guidelines of the calculator policy:
ACT Calculator Policy
How to Study: Start by testing yourself on the below practice test from ACT®. The first link has math questions only, the second is a free, downloadable guide for the entire test. (There are lots of free practice tests online but the official one will have the most relevant questions). Use a similar calculator as you will use on your test. Since the test is timed, practice in a timed environment as well! There are 60 math questions in 60 minutes.
ACT Math practice Questions
ACT Study Guide with Practice Tests
General Study Tips: If you haven't found them already, Chris has a great series of videos on HOW to study including how to counter math anxiety prior to a big test and the best ways to prepare. Study Tips
ACT Math Section
Pre-Algebra 20-25% Adding & Subtracting Using the Number Line Prime Numbers, Factoring, Factorization & Divisibility Roots & Radicals Exponents Scientific Notation Ratios & Proportions Percents & Interest Lots of Probability Vocab Lots of Statistics Vocab
Elementary Algebra 15-20% Introduction to Variables & Expressions Solving Basic Equations Distribution & Combining Like Terms Solving Linear Inequalities Polynomial Graphs: Zeros, Multiplicity & End Behavior Adding Polynomials Finding Rational Roots of Polynomials "FOIL" (First Inside Outside Last) Methods of Factoring
Geometry and Measurement (Plane Euclidean) 20-25% Area of Rectangles and Squares Area of Triangles Area of Parallelograms & Trapezoids Area of Kites & Rhombuses (Rhombi) Area of Regular Polygons Area of Circles & Sectors Area & Volume of Similar Figures Volume of Solids Surface Area of 3-D Shapes
Geometry and Measurement (Coordinate) 15-20% The X-Y Plane Basic X-Y Graphs Distance & Midpoint Formulas Lines & Equations of Lines Transformations, Reflections, Isometry & Mapping Angle and Segment Bisectors Parallel Lines & Transversals Parabolas, Ellipses, Circles & Hyperbolas
Geometry and Measurement (Trigonometry) 5-10% Intro to Trig - SohCahToa "Special" Triangles -- 30-60-90 & 45-45-90 Secant, Co-Secant, and Co-Tangent: the "other three" trig functions
Intermediate Algebra 15-20% Factoring Quadratics Solving Quadratic Equations Solving Systems of Equations Imaginary & Complex Numbers Matrices
ACT® is the registered trademark of ACT®, Inc. has no affiliation with ACT®, Inc, and the ACT® test prep course is not approved or endorsed by ACT®, Inc.