1.有效教学的前提是激发学习兴趣。在对高一新生的调查中,发现一部分学生虽在初三学习了一年的化学,然而他们对化学学科的兴趣却都不高,而且还或多或少对化学产生畏惧、甚至是恐惧心理。在他们对化学知识一知半解的认识中,认为化学物品既不环保,又有污染,而且还带有腐蚀性。因此在实验室里就会经常出现学生做实验时缩手缩脚,担心出现被污染或腐蚀的情景。作为教师,我们应该不急于向学生传授知识,应该 1. The premise of effective teaching is to stimulate interest in learning. In a survey of freshmen, some students found that although they had studied chemistry for a year in their third year, they were not very interested in chemistry and were more or less fearful of chemistry or even fearful . In their knowledge of chemical knowledge, knowledge of chemicals is neither environmentally nor polluting, but corrosive. Therefore, in the laboratory, students often try to shrink their hands while doing experiments, fearing contamination or corrosion. As teachers, we should not be in a hurry to impart knowledge to our students and should