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分组实验是在教师指导下学生独立进行操作的实验,它是实验教学重要内容。教师要从研究实验内容,熟悉实验仪器入手,明确实验的目的要求,弄清实验在教材中的地位和作用,在课前要反复试做,了解各仪器的构造、性能、原理、使用方法、注意事项等。根据试做情况,预测学生在实验中哪个部分能独立完成、哪个部分需要教师讲解、指导(难度大的地方可做部分演示),哪个部分易出问题。哪些学生应作为重点指导对象等,教师必须做到了如指掌。
Group experiment is under the guidance of teachers, students operate independently experiment, it is an important part of experimental teaching. Teachers from the study of experimental content, familiar with the experimental apparatus to start a clear purpose of the experiment requirements, to clarify the position of the experiment in the teaching materials and role in the trial before and repeatedly to do to understand the structure of the instrument, performance, principles, methods of use, Precautions and so on. According to the trial situation, predict what part of the students in the experiment can be done independently, which part requires teachers to explain, guide (difficult to do part of the demonstration can be done), which part is easy to problems. Which students should be the focus of guidance, teachers must be well aware of.