The starry sky classification volume is suitable for Jilin Province. Star sorting paper is suitable for students with weak foundation and poor grades to practice. There are many real questions at the end of the thesis, and there are also simulation questions and full-real exercises in the final thesis. The number of questions belongs to the middle level, and it is also the middle level if it is difficult. The starry sky classification volume is to systematically sort out all the knowledge points of primary school mathematics, so that the corresponding knowledge points and problem-solving methods of each module can be systematically recorded in the mind, and the intention of the questioner and the knowledge points and methods of solving the subject can be seen at a glance.