| Point conic is the heavy and difficult crux of Mathematics teaching in senior high school, It embodied the basic thought of analytic geometry concentratedly. But DGS is the calculator tool of a kind of mathematics type, it can nicely make a show of born process of geometric dynamic states. And imply with convenient for students comprehending geometric phenomena,discovering geometric regularity. But the technology platform is not well applied, in the middle school teaching at present.Based on three aspects of teaching objectives, teaching process and teaching effectiveness ,This study discuss and analyse the impact of point connic teaching by using DGS.Use of new curriculum elective high school mathematics textbooks of the conic section "oval knowledge " element of teaching,selectting two different teaching methods-the conventional teaching methods and the teaching methods on the DGS technology 's platform conducts experimental research.Before the experiment, Under the premise of the idea of the new curriculum ,I study the status of the integration of DGS and middle school mathematics and the status of ponit conic.teaching At home and abroad in recent years.In order to provide theoretical support for conclusions, I conducted in-depth research ,DGS and point conic teaching.Based on Constructivism, Value of mathematics education, Characteristics of the geometric teaching ,Making a analysis of DGS, Thinking it is no longer a tool supporting mathematics education,But a part of mathematics teaching; Discussing the teaching requirements of ponit conic teaching and teaching characteristics, from multiple perspectivesIn the experiments, I used research methods of Two-level single-factor quasi-experimental group. In Sanya No.l Middle School two classes of senior grade (experimental class, Comparison class), Selected 40 students as the tested object and spend a month on.carring out Experimental Study. In the experimental study of the process, according to some related theorys,made a effective control to independent variables,and got real valid experiment datas,by using SPSS 15.0 statistical software ,those test datas were matched sample T test. After Finishing comprehensive survey of students, teachers, interviews and other materials, this study concluded: "By using DGS ,point conic knowledge of teaching are not well achived Teaching objectives, but the Ability 's objectives and the Affective objectives are enhanced well;In teaching process, teachers become the guide and collaborators of students ,students become the main part in class, and whoes Capacity and awareness of self-exploration have developed. ;But compared with the conventional teaching ,the teaching effect of the teaching of using DGS is obvious, it was very popular with teachers and students. " May be due to lack of experimental preparations, the cycle is too short and other factors, this teaching method has not help students improve significantly their unit test results of "oval knowledge " But I think that as long as the long-term adherence to DGS as a platform for teaching methods, will enable students' mathematical thinking.
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