It is a scientific, practical and efficient learning method, which grasps the essential law of the subject. Through the in-depth analysis, induction and summary of the questions, several refined problem-solving models are refined, and according to the single use, application and continuous use of the models, students can solve ever-changing questions. Published by Peking University Press, 386 yuan a copy, and 20 math CDs. I am a sophomore, and I am also using it. There are memory cards, manuals, and various methods and skills. I have made great progress in math, but I used to be only average. I think it's a little expensive, but I have tasted the joy of victory. Come on, everyone. I wish you a good result!