Quantum ACT Prep in its current form contains a large library of video explanations to mathematics questions from 67 unique official ACT tests (4020 videos). Each problem from the official test is explained in a separate video where I will illustrate the most efficient way to tackle a problem.
If you have any questions or suggestion please send me an email. And if you are preparing for the SAT test, then you can access the companion site SAT Quantum. Thank you and best wishes for your ACT preparation.