数学教学中,充分运用投影手段,挖掘数学视觉形象,可使一些晦涩、抽象的东西变为明朗、具体,从而达到教师易教,学生易学的目的。 我在这方面作了一点尝试,愿与大家在研制投影片时,根据一定的信息内容,选择一定的表现方法与之相适应,这就是投影技巧。投影技巧有翻折、抽拉(平移)和旋转三种。 下面分别举例说明 In mathematics teaching, making full use of projection methods and excavating the visual image of mathematics can make some obscure and abstract things clear and specific, so as to achieve the purpose of educating teachers and students. I have made some attempts in this regard. I would like to work with everyone in the development of slides, according to certain information content, select a certain expression method to adapt to it, which is the projection technique. There are three types of projection techniques: foldback, pull (pan), and rotation. The following examples illustrate