Problem Solving Key: Mathematics Daybreak in the Training Class

It is written for my son who is about to enter high school. It is also suitable for children in areas with backward education or weak students in ordinary high schools in cities. This article summarizes some questions that students often ask during my more than ten years of teaching and training career, and answers them in the form of dialogue. It can be regarded as a high school mathematics tutorial book in the form of The Analects of Confucius.