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由于学科特点,初中化学中有许多微观知识、实验操作等不能只靠教师的一张嘴和手头的一支粉笔来讲解清楚,多媒体技术已走进越来越多的学校和课堂。多媒体技术以生动、形象、直观的动画、声音、图片、文字信息等,更好地展现出化学学科的基础知识,模拟微观世界物质的组成、结构和运动。演示有危害、有污染和不容易操作的实验。大量展示贴近日常生活与衣食住行密切相关的化学物质、化学现象、化学变化,才能更好地激发学生兴趣,增加学习信息量,简化了课堂结构,启发学生思维,从而提高课堂效率。这也是诸多教师一直追求的目标。笔者结合这些年的教学实践,对如何利用多媒体技术提高化学课堂效率谈一些体会。
Due to the characteristics of the subject, junior high school chemistry has many micro-knowledge, experimental operation, etc. can not only rely on a teacher’s mouth and a piece of chalk at hand to explain clearly, multimedia technology has entered more and more schools and classrooms. Multimedia technology shows the basic knowledge of chemistry better and simulates the composition, structure and movement of material in the micro-world with vivid, vivid, visual, animated, sound, picture and text information. Demonstrate harmful, contaminated and not easy to experiment. A large number of chemical substances, chemical phenomena and chemical changes closely related to daily life and basic necessities of life can be greatly displayed to stimulate students ’interest, increase the amount of information, simplify the classroom structure and inspire students’ thinking so as to improve classroom efficiency. This is also the goal many teachers have been pursuing. The author combines these years of teaching practice, talked about how to use multimedia technology to improve the efficiency of chemical classroom experience.