I am a ninth-grade student, Anthracene. First of all, I want to answer the subjects that are suitable for doing the wrong book: mathematics is the most suitable subject, followed by physical chemistry, English and other basics. Mathematics is unnecessary. It is highly recommended to set the wrong question book. This is my personal experience. I have one. Although I haven't experienced the big exam yet, in the usual unit exam and monthly exam, my worst score in mathematics is 97, and the rest are full marks. Maybe it was you. It doesn't matter. Mathematics is my best subject. The topics of mathematics are ever-changing and varied. Unlike Chinese, which is a basic reading composition, you should record the questions you missed. Many people want to build it, but they don't stick to it. I'll teach you a trick: the key is to be interested. Of course, if you want to do it yourself, you can stick to it. Don't be so rigid as others, have your own personality, and you can change your name. Don't call a book with the wrong title, take a personalized name such as , < > ... and so on. You can imagine yourself writing a book, a classic math book, to improve your interest. The above is my personal experience, I hope you can refer to it. I wish you full marks in math every time! !