教材与学生分析该教学内容为地图出版社出版的高中《信息技术基础》第二单元《有效获取信息》的第一节内容。该节主要内容为三部分:一是信息来源的多渠道(来源);二是信息数字化的相关设备与操作(转换);三是数字化表示(存储)。该内容为整个教材后续学习的重要基础。从以往的实践 The teaching materials and students’ analysis of the teaching content is the first section of the second section of the “Information Technology Basics” high school information publication published by the Map Publishing House. The main content of this section is divided into three parts: one is the multiple sources (sources) of information sources; the second is related equipment and operations of information digitization (transformation); the third is digital representation (storage). This content is an important basis for the follow-up study of the entire teaching material. From past practice