Quasi-experimental Research On The Activity Of "Speaking Mathematics" In The Teaching Of High School Le-triangle

Solving triangles is an important tool for mathematical modeling and training of mathematical thinking,and it is also a compulsory knowledge point for college entrance examination every year.At the same time,the knowledge of solving triangles is often checked together with the knowledge of triangular identity transformation and geometric proof in college entrance examination,which makes it more difficult for students to understand and apply the knowledge of this chapter.To carry out "speaking mathematics" activities in teaching can not only improve students' mathematics achievements,but also enhance students' interest in mathematics learning.Scholars have made preliminary attempts to carry out the research of "speaking mathematics" in high school mathematics teaching,such as conic curve teaching,etc.,but it is still a brand-new field to carry out the research of "speaking mathematics" in the teaching of solving triangles.Therefore,from the perspective of "speaking mathematics" activities,this study designs and implements the teaching design of "speaking mathematics" activities in the teaching of solving triangles.Finally,taking the unit test results of solving triangles knowledge and students' interest in mathematics learning as evaluation indexes,it measures,investigates and interviews the results of teaching practice.As follows:Firstly,through literature analysis,the author combs the literature of "speaking mathematics" activities,the teaching of solving triangles in senior high school mathematics,and the activities of "speaking mathematics" in teaching,and determines the evaluation criteria of "speaking mathematics" activities in teaching: mathematics achievement and learning interest.Secondly,based on the theoretical basis and related teaching research of "speaking mathematics" activities,this paper summarizes the principles,five links and specific requirements of "speaking mathematics" in the teaching of solving triangles,and designs the teaching of each section of solving triangles accordingly.Finally,two parallel classes of senior high school in LC city were selected as control class and experimental class.The results of solving triangle unit test paper show that after one month's "speaking mathematics" activity teaching,the students in the experimental class have significant differences in mathematics performance compared with the control class;the results of questionnaire investigation and interviews with some students after the experiment show that: The students' interest in mathematics learning in the experimental class was significantly different from that before the experiment(pre-test and post-test in the same class,paired sample T-test).Therefore,this study can provide a reference for improving the learning achievement,learning interest and carrying out "speaking mathematics" activities in solving triangle teaching.