论文部分内容阅读
在圆锥曲线教学中,演示类课件的运用十分广泛,例如演示点、线的运动轨迹,演示变量的连续变化,使静态的图形动态化等等.教师们希望通过课件使数学教学变得更直观,让学生更容易理解和接纳知识.但是在实际教学中,如果不能合理的运用演示类课件.不仅不能促进教学,反而会影响学生的思考.首先,我们在使用课件前要明确教学目标.根据数学课程标准(系列2)对圆锥曲线与方程这一内容的要求中,相对于结论而言.推导和证明过程是更为重要的.这是使用演示型课件的基本原则之一.下面笔者例举一些教师发表在《中国多媒体教学学报·数学》中的课件做出说明.案例一:“圆锥曲线的九种特性类比探究”(《中国多媒体教学学报·数学》2006年第3期)这个课件中用动画的形式表现圆锥曲线特性.但课件本身并未涉及这些性质的具体证明方法和推导过程.这个课件在实际运
In conic teaching, the use of demonstration courseware is very wide, such as demonstration points, the trajectory of lines, the continuous variation of demonstration variables, the static graphics, etc. Teachers hope to make mathematics teaching more intuitive through courseware , So that students more easily understand and accept knowledge.But in the actual teaching, if you can not reasonably use demonstration class courseware, not only can not promote teaching, but will affect students’ thinking.First of all, we need to clarify the teaching objectives before using the courseware.According to Mathematical Course Standards (Series 2) Among the requirements for the content of conics and equations relative to the conclusion, the derivation and justification of the process is even more important, which is one of the basic principles of using demo courseware. Take some teachers published in the “China Multimedia Teaching Journal Mathematics” to make a description of the case.Case I: “Nine characteristics of conic curve analogy” (“Chinese Journal of Multimedia Teaching” 2006 the third period) This courseware presents the conic characteristic in the form of animations, but the courseware itself does not involve the specific proof methods and derivation process of these properties.