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为了使学生较好地掌握化学基本知识和技能,开发学生智力,我们在化学教学中对加强直观教学的一些具体方法作了探讨。一、让学生传看重要物质的样品教师在讲到一种重要的物质的颜色、状态和气味等性质时,通常只是在讲台上展示一下样品,并配以口头介绍或要求学生看课文中的内容。个别教师从样品出示到放回仪器盘的操作时间甚短,即使坐在前面1—3排的学生,也未能看清。为了让学生获得清楚的感性知识,我们采用了让学生传观化学物质样品的方法。例如,高一化学中讲到氯气时,我们把四只装有饱和氯水样品的瓶子,分给四排学生,请他们较
In order to make students better grasp the basic knowledge of chemistry and skills and develop students' intelligence, we discuss some specific ways to strengthen visual teaching in chemistry teaching. Sample Letting Students See Important Materials When talking about the color, condition, and smell of an important material, teachers usually show samples on the podium with verbal introduction or asking students to read the text content. Individual teachers from the sample presentation to put back the instrument tray operation time is very short, even sitting in the first 1-3 rows of students, but also failed to see. In order to give students a clear sense of perceptual knowledge, we have adopted a way for students to pass through chemical samples. For example, when we talked about chlorine in Highschool of Chemistry, we assigned four bottles of saturated chlorine water samples to four rows of students asking them to compare