一、转变演示实验角色,由学生担任主角传统的演示实验采取由教师讲解、示范,学生通过观察、记忆、想像等方式掌握知识和动作要领的教学模式。这种模式往往使学生始终处于被动状态,虽形成了操作技能的初步印象,但没有完全内化为自身的技能,不利于达到新课标对学生技能性学习目标的要 First, to change the role of demonstration experiment, the traditional demonstration experiment of students as the protagonist adopts the explanation and demonstration by the teacher. The students grasp the teaching mode of knowledge and action essentials through observation, memory and imagination. This model often makes students remain in a passive state. Although it forms a preliminary impression of operating skills, it does not completely internalize its own skills, which is not conducive to achieving the target of the new curriculum standard for students’ skills learning.