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高中地理课本“地球在宇宙中”一章里,对地球运动和天体视运动的一些问题,学生往往感到蒙蒙胧胧,茫然无措。这些问题形式多样,变化无穷,对此我们绝不能头痛医头,脚痛医脚;只能从本质问题入手,从根本上解决问题,即必须提高学生的空间思维能力,使学生解决这类问题时能举一反三,触类旁通。高中学生正在学习立体几何,有了一定的空间想象力,对地理课教学提供了较好的条件,但数学课里涉及的空间问题也只是“静态”的东西,而地球运动和天体视运动是一种“动态”的现象,相比之下,大大提高了问题的难变和深度。如何化难为易,变繁为简?我采用的办法是:分解运动过程,采用直观演示或图解的方法,就其几个题例,讲深
In the high school geography textbook “Earth in the Universe” chapter, students often feel guilty and unprepared about some problems of the earth movement and the celestial visual movement. These kinds of problems are various in form and change endlessly. We must never stop dealing with them, and we must only start with the essential problems and fundamentally solve the problem. That is, we must improve students’ spatial thinking skills so that students can solve such problems. When it comes to inferences, it is analogous. High school students are learning solid geometry and have a certain amount of spatial imagination. They have provided better conditions for geography teaching. However, the spatial issues involved in mathematics classes are only static things, while the earth movement and celestial vision Sports is a kind of “dynamic” phenomenon. In contrast, it greatly increases the difficulty and depth of the problem. How can we turn it into something difficult and easy to change to become simple? The approach I used was: to decompose the movement process and use intuitive demonstrations or diagrammatic methods to explain the depth of several examples.