You pay a monthly fee to help you with learn from their questions and math examples but 80% of them are WRONG. I love the idea of this website but honestly why am I paying so much money so that I can be taught the wrong way? I used to There math section to work on a review sheet and my real life tutor graded it and only 7 out of 40 questions were right. Ridiculous. Maybe hire someone to quality check or something. We shouldn't have to pay this much money to be given wrong lessons and wrong examples.