Research On Teaching Strategy Of The Theme Of Solid Geometry's Preliminary In Senior High Schools Under New Curriculum Standard

At present,the common feature of curriculum standards in various countries is to increase mathematics content with wide application and develop mathematics from reality.The new trend of curriculum development in various countries is to emphasize mathematics communication.The general goal of mathematics curriculum in senior high school(2017 edition revised in 2020)is given: students are able to achieve the three-dimensional goals of knowledge and skills,process and method,emotional attitude and values of mathematics learning by learn mathematics curriculum in senior high school.Solid geometry is the key to guide students to study geometry and receive comprehensive thinking training.At the same time,it also cultivates students' strong interest in geometry,develops students' ability of spatial imagination,graphic language communication,reasoning and demonstration,and geometric intuition.This paper studies in detail the changes of high school mathematics curriculum under the new curriculum standard in China,analyzes the contents and requirements of the preliminary theme of solid geometry in the new textbook.The knowledge core content of the preliminary theme of solid geometry has not changed as before,but the content of the three views has been deleted from the new textbook,and the order of knowledge structure has been changed.On the basis of theoretical research,combined with the characteristics of mathematics learning,high school students' characteristics of cognitive development and the experience of mathematics teachers working in the front line of teaching.The author has compiled the Test Paper of Preliminary Theme Learning of Solid Geometry for Senior High School Students and the Questionnaire of Preliminary Learning of Solid Geometry for Senior High School Students.A total of 107 first grader from Yanbian No.2 Senior High School in Jilin Province were tested.The interview method was used to investigate the mathematics teachers of grade one in senior high school.In order to study their understanding of the preliminary theme teaching of solid geometry under the new textbook and new curriculum standard.The variables of questionnaire data were set,conducted statistical analysis and value were analyzed by SPSS23.0 software.The survey results show that there are some problems in learning the preliminary theme of solid geometry for senior high school students: difficulty in learning the preliminary theme of solid geometry due to the disconnect with previous knowledge;insufficient spatial imagination;unclear understanding of the preliminary theme of solid geometry;lack of good mathematics learning habits;insufficient standardization of the problem-solving process of solid geometry.In this paper,literature research,questionnaire survey and interview are used to explore the problems.Causal analysis and comparative analysis are used for qualitative analysis to study the causes of the problems.According to the relevant "learning theory",combined with the summary of teachers' interviews,the reasonable and feasible preliminary teaching strategies of solid geometry are obtained: students need to adjust their psychological state and develop good study habits in the study of the preliminary theme of solid geometry;establish the concept of mathematics learning and formulate the mathematics learning plan of the preliminary theme of solid geometry;be diligent in observation,be brave in thinking and strengthen the standard of problem solving.Teachers need to deeply understand the teaching requirements of the preliminary theme of solid geometry and analyze the students' situation in detail;reasonable teaching design of the preliminary theme of solid geometry to ensure smooth and efficient classroom;consolidate the preliminary theme knowledge of solid geometry in time and attach importance to teaching evaluation.Teachers and students coordinate with each other which makes the preliminary theme teaching activities of solid geometry smoothly and orderly,meets the social development trend to complete the mathematics teaching goal.