As citizens in the information age, no matter what occupation they are engaged in, they will encounter a lot of unorganized data and information. People need to have the ability to process and interpret information and make judgments and decisions based on it. Probability and statistics knowledge has become an important part of modern citizens' knowledge structure. Some developed countries have added concept statistics to the curriculum of primary and secondary schools very early, and accumulated rich experience after decades of probability statistics teaching. On the contrary, this part of the content entered the middle school curriculum in China relatively late. After four changes [1960, 1978,] 1980, 1988], it was "recognized" in the "Nine-year compulsory education junior high school mathematics syllabus". 200 1 The Ministry of Education promulgated "Compulsory Education Mathematics Curriculum Standard (Experiment)", further taking "Probability Statistics" as one of the four modules, and stipulated the teaching contents and requirements of statistics in different periods. In 2003, "Probability and Statistics" was also listed as one of the five compulsory modules in "Mathematics Curriculum Standard for Ordinary Senior High Schools" (experimental draft) by the Ministry of Education, and all elective modules were compulsory for students of arts and sciences, thus redefining the position of probability in middle school curriculum. Because "probability" started late in mathematics teaching in primary and secondary schools in China, in the implementation of the new curriculum experiment, teachers need to master how to teach "probability" in order to meet the new curriculum standards and the real intention of textbook writers. High school mathematics new course elective course 2-3 "Probability".