If you are the focus of the district, buy a copy of Zero Distance of Mathematics in College Entrance Examination (divided into the first round and the second round). The second round is special improvement training. This book contains many high school mathematics ideas (function equation ideas, classified discussion ideas, combination of numbers and shapes, transformation and transformation, induction and conjecture, etc.). Of course, if you choose liberal arts, you will buy liberal arts.
If you are the focus of the city, I suggest you buy a higher and better way of thinking in high school (edited by Cai). PS。 The author of this book regards this book as the textbook of the key class in their school in 2006. The average math score of their college entrance examination class was 143. In general, the city's key review is much earlier than the district's key review, and it is basically reviewed at the beginning of the third year of high school (we have finished reading the third year of high school), so the starting point is relatively high. This book mainly talks about the problem-solving strategies of hot topics in the college entrance examination, as well as mathematical ideas and a large number of finale questions in the college entrance examination, each of which is good and very suitable for one's self-study.
I hope to adopt my personal opinion.