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预设和生成作为一对矛盾的统一体,共同存在于课堂教学中,预设中有生成,生成离不开预设。将预设和生成结合起来不仅是一种教育的科学,更是一种教育的艺术。前苏联教育家苏霍姆林斯基说“教育的技巧并不在于预见到上课的所有细节,而在于根据当时的具体情况,巧妙地在学生不知不觉之中做出相应的变动”。在实际教学中,如何把握和处理课堂教学的预设与生成,是我们教师需要关注和研究的重要问题。对化学实验教学而言,主要表现在以下几个方面。
Predefined and generated as a pair of contradictory unity, coexist in the classroom teaching, there are presuppositions generated, the formation can not be separated from the default. The combination of presupposition and generation is not only an educational science, but also an educational art. Sukhomlinski, a former Soviet Union educator, said: “The trick of education is not to foresee all the details of class, but rather to make the corresponding changes skillfully among the students according to the circumstances at that time.” " . In the actual teaching, how to grasp and handle the precondition and formation of classroom teaching is an important issue that our teachers need to pay attention to and study. For chemical experiment teaching, it is mainly manifested in the following aspects.