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一、动机在中学化学教学大纲(修订草案)里,明确地告诉我们:“在教学中应该使学生对于所学过的物质和物质的现象具有鲜明而具体的观念。对理论教材,教师必须按照学生年龄特征和知识水平,通过具体事例或通过观察和实验,清楚生动地加以阐明”。在凯洛夫教育学中也明显地指示着:“应当竭力使学生观察到在变化、发展和活动中的东西”、“在演示时,务必使全班学生都能清楚地看到。”同时又参阅了有关类似的参考资料,总的精神说明了直观教学对化学科的课堂教学是
First, the motivation in the chemistry teaching syllabus (revised draft), clearly tell us: “In teaching should enable students to have learned material and material phenomena with a clear and specific concept of the theoretical textbooks, teachers must follow Students’ age characteristics and level of knowledge are clearly and vividly illustrated through concrete examples or through observation and experimentation. ” It is also clear in Kilov’s pedagogy that “every effort should be made to enable students to observe what is going on in change, development, and activity” “It is important to make sure that the entire class is clearly visible during the demonstration.” See also for a similar reference, the general spirit of the visual teaching of chemistry class teaching is