现行的初、高信息技术教材考虑到学科自身特点、地域差异,采取了零起点、螺旋式上升的知识体系,由此带来的现象是初中、高中信息技术教材中知识重叠的现象十分突出,如果日常教学中处理不当,很容易造成重复教学,甚至导致部分学生产生厌学情绪。为了避免初中学过的内容到了高中还得学习一遍的重复教学现象,我们很有必要对教 The current textbook of high and new information technologies takes into account the characteristics of the subject itself and its geographical differences and adopts a knowledge system of zero-starting and spiraling. The resulting phenomenon is that knowledge overlap in information technology textbooks of junior and senior high schools is very prominent. If not properly handled in daily teaching, it is easy to cause repeated teaching, and even lead some students to weariness. In order to avoid the content of junior high school have to learn again in high school repeated teaching phenomenon, we are necessary to teach