Every math test in the world needs preparation. Teacher-based options to prepare for the test are very expensive. Also, the quality gap between a teacher-based approach and any affordable online platform is huge. The reason for this is that If a student has a deep confusion in the way he understands a concept, until now, only a teacher could help in the learning process. Just exercising or watching a video is proved that it doesn't work.In Chile, the gap between the different possibilities to prepare the PSU is big. Revolución PSU is an intelligent web- based math learning system. Our method is based on the idea that every mathematical problem can be broken down into the minimal skills required to solve it. Revolución PSU finds the ones the student is missing, and then teaches those skills and how to ensamble them, through tutorial videos and exercises.Said so, we're going to be able to construct a better base for our students, diminishing the gap for everyone.