“下水实验”是指教师在课前对课堂实验进行多次预演或试验,把握实验教材、掌控实验细节、精选实验器材和改进实验材料,从而有效指导学生进行科学探究的行为。实验是小学科学课堂教学的重要组成部分,为了保证实验的成功,教师很有必要进行“下水实验”。在此,笔者主要结合具体的教学案例,分析“下水实验”的重要性,谈谈教师如何进行“下水实验”。一、把握实验教材小学科学课程区别与其他课程的三 “Launching experiment ” refers to the teacher pre-class classroom preview rehearsal or experiment, grasp the experimental teaching materials, control the experimental details, selection of experimental equipment and improve the experimental materials, so as to effectively guide students conduct scientific inquiry behavior. Experiments are an important part of science teaching in elementary schools. To ensure the success of experiments, it is very necessary for teachers to carry out “launching experiments”. Here, I mainly combine specific teaching cases to analyze the importance of “launching experiment” and talk about how teachers can conduct “launching experiment”. First, grasp the difference between primary school science curriculum and other courses of experimental teaching materials III