Yes, I am a math teacher in grade one. It is this supplementary book that I recommend to my classmates. The arrangement of this book is very scientific, and each unit is from basic to comprehensive, from easy to difficult, which conforms to the basic logic of students learning new knowledge. Moreover, the test questions inside are particularly new, and the choices are typical, and the training effect is better. For students with weak foundation, it is suggested to do more test questions in the study area and then practice in the comprehensive area, where there will be college entrance examination questions and simulation questions. In addition to the exam book, "Yi Chuan" also distributed a book "Learn to Think and Use" in senior three, summarizing the difficulties in the book. The students in our class especially like this book, so focus on it. They recited it before the exam. The answer is a single book, three volumes, which is correct. Students with poor foundation can also thoroughly understand the knowledge points.