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说来真有些不好意思,笔者从教已经20余年了,各级各类的实验技能大赛也参加不少次了,但有时在实验操作中,手还是经常会发抖,有时还“颤抖”得很厉害。1实验时紧张手抖频出错1.1展示课实验操作不当这是一节展示课,听课的是学校朝夕相处的几十位教师,内容是《食盐的溶解》。一个月前,在县级评优课中获一等奖。没想到,参赛时一帆风顺,展演时却丑态百出。在天平上称取30g食盐时,笔者直接用小勺
I’m sorry to say that I have been teaching for more than 20 years, and all kinds of experimental skills competitions of all levels have also participated in many times. However, in practice, the hand often shivers and sometimes trembles Very powerful. An experimental nervous hand-shaking frequency error 1.1 display class improper operation This is a demonstration class, listening to the class is dozens of teachers get along day and night in the school, the content is “salt dissolved.” A month ago, she won the first prize at the county level honors class. Unexpectedly, when all was well, when the show was ugly. Weigh 30g salt in the balance, the author directly with a small spoon