《普通高中数学课程标准(实验)》倡导自主探索、动手实践、合作交流、阅读自学等学习数学的方式,使学生的学习过程成为在教师引导下的“再创造”过程.学生的学习过程是学生依据自已的知识结构和数学活动经验,让知识在大脑中不断自然生长从而建构知识的过程.下面笔者通过《椭圆的标准方程》的教学谈谈自已的一点想法.1.设置情境,引入新课 “Ordinary high school mathematics curriculum standard (experiment)” advocates self-exploration, hands-on practice, cooperation and exchange, reading self-study and other ways to learn mathematics, so that students’ learning process becomes a “re-creation” process under the guidance of teachers. Process is based on their own knowledge of the structure of the students and mathematical activity experience, so that knowledge in the brain continue to grow naturally to build knowledge process below the author through the “elliptical standard equation” teaching to talk about their own ideas 1. Set the situation, Introduce a new lesson