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美国教育家苏娜丹戴克曾说过:“告诉我,我会忘记,做给我看,我会记住,让我参加,我就会完全理解。”在平时的教学中,老师经常发出感慨,这个题目不是讲过好多遍吗,怎么还不会?真的老师讲的多,学生就一定会吗?1教学实例在高三复习中,学生对一些实验操作掌握不是很好。例如下列有机实验的两个选项:(1)将CH3CH2Br与Na OH溶液混合加热,再滴加Ag NO3溶液,可检验CH3CH2Br是否发生水解。
American educator Sue Danek Dyke once said: “Tell me, I will forget, do for me, I will remember, let me participate, I will fully understand. ” In the usual teaching, the teacher Often sent a feeling, this topic is not talked about many times, how not yet? Really teacher to talk about more, the students will? 1 teaching examples in the third year of review, the students mastery of some experimental operation is not very good. For example, the following organic experiment of the two options: (1) CH3CH2Br mixed with NaOH solution heating, and then dropping AgNO3 solution can be tested CH3CH2Br hydrolysis.