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为了提高中学化学的教学质量,很多学校都学习了苏联先进教学经验,实行“边讲边实验”教学法。这种教学法的特点就在于在讲解中要插入一些学生实验,所以妥善地选择实验内容,就成为实行这种教学方法的一个重要问题。如果教师怕麻烦,让学生少做实验,就抹煞了这种教学法的优越性。相反地,如果单纯为了活跃课堂教学,把必要的和不必要的实验一齐搬上来,单是实验就占去一节课的一大半时间,由于侵占了讲解的时间,解释问题就可能不够细致、深入。这一来不但达不到改进教学的目的,相反地反会影响教学质量。所以在选择学生实验时,应该特别注意。根据过去实践中的体会,我认为必须注意以下两个方面。
In order to improve the teaching quality of chemistry in middle schools, many schools have learned the advanced teaching experience of the Soviet Union and implemented the teaching method of “teaching while talking about the edge.” The teaching method is characterized by the insertion of some student experiments in the explanation, so proper selection of the experimental content becomes an important issue in the implementation of this teaching method. If teachers are afraid of troubles and have students experiment less, they negate the superiority of this teaching method. On the contrary, if the purely active classroom teaching, the necessary and unnecessary experiments were brought together, the experiment alone accounted for most of the time a lesson, due to encroach on the time to explain, explain the problem may not be meticulous enough, In-depth. This not only failed to achieve the purpose of improving teaching, on the contrary will affect the quality of teaching. So when choosing a student experiment, you should pay special attention. Based on past experience, I think we must pay attention to the following two aspects.