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在多年的化学教学中,我给学生做了无数次演示实验,也带学生做了无数次学生实验。随着青丝变为苍发,教学技能日积月累,我逐渐发现初中化学文本中的部分演示实验有改进的必要。经自己钻研思考,同事间相互探讨,今把平日的积累精心修剪,缀以成文,以飨各位读者。一、保证化学反应原理,选择非文本物质,改进演示实验在保证化学反应原理这条红线不被践踏的前提下,选择非文本中的传统性物质,用新的化学反应类型,重
In many years of chemistry teaching, I gave my students countless demonstrations of experiments, but also with students to do numerous student experiments. As black hair becomes pale, teaching skills over time, I gradually found some of the junior high school chemistry text demonstrating the need for improvement. After studying their own thinking, colleagues discussed each other, this week’s accumulated well-trimmed, decorated with written language, in order to you readers. First, to ensure that the principle of chemical reaction, the choice of non-text material, to improve the demonstration experiment In ensuring the chemical reaction principle of this red line is not trample under the premise of the choice of non-text in the traditional material, with a new chemical reaction type, weight