Investigation And Research On Current Situation Of Solid Geometry Teaching Under The Background Of Core Literacy

In order to deepen the curriculum reform and carry out the fundamental task of cultivating people by virtue,the curriculum standard of ordinary high school mathematics(2017 edition)(hereinafter referred to as curriculum standard(2017))clearly points out the core accomplishment of mathematics discipline,and takes the development of students' core accomplishment of mathematics discipline as the training goal of high school mathematics education.As an important part of high school mathematics curriculum,solid geometry bears the educational value of cultivating students' core literacy of mathematics.In order to better develop students' core quality of mathematics and improve the teaching efficiency of three-dimensional geometry,it is of great significance to study teaching and learning situation of three-dimensional geometry.Because free-response question of solid geometry not only can examine student's solid geometry system knowledge and core literacy of mathematics,but also occupies the important position in mathematics college entrance examination,so the article makes the three-dimensional geometric solution as the carrier,and is based on the content requirements about solid geometry in the curriculum(2017)and the examination rules about it in the university entrance exam,aiming to compile the learning test and questionnaire which can effectively evaluate students' situation in solving the problems,and to survey the teaching situation by testing the selected samples.By analyzing the students' answers,concluding problems in solving,and thinking about students' difficulties in the learning process,finally the corresponding teaching strategies with specific teaching design are put forward.This study is aimed at science classes in Grade 3,of which there are 255 students are selected as the sample,and by analyzing the effective data with Excel and SPSS,the following conclusions are drawn:(1)Students have some misunderstandings of basic knowledge of solid geometry,especially can not accurately master the fundamental theorem of content,basic concepts and the logical relationship between theorems.(2)students' ability of logical reasoning needs to be improved,and the ability to standardizing the problems in math by discerning,using the theorem also needs to be improved;(3)Students need to improve the ability of visual imagination,they still can not understand geometrical concept better andsolve the problems in math with the help of diagram;(4)Students need to improve their operational capability,they are not able to analyze the operand better,and to design logical and easy operation steps to solve Space Angle with a good habit in operation;(5)teachers' awareness of implementing the goal of core literacy training in three-dimensional geometry teaching is not strong enough and teachers lack teaching practise.According to the above research conclusions,the following suggestions are proposed for the teachers.(1)pay attention to the "double bases" and lay a solid foundation for solid geometry.(2)standardize the expression and make problem solving more careful;(3)penetrate thoughts and build logical reasoning ladder;(4)strengthen the drawing and skillfully use the spatial geometric model;(5)attach importance to cohesion and pay attention to differences in thinking level;(6)enhance awareness and implement the goal of literacy training.