一、调整认知,纠正错误的前概念学生的前概念大多来源于学生自己的生活经验和直观感受,由于受认知规律、思维特点、生活环境等影响,使得这些前概念有些是正确的,有些则是片面的,甚至是错误的。而作为起主导作用的教师,要准确地把握时机,想办法创设适合学生参与的问题情境,激发学生去实验、去思考、去分析、去判断,从而发现规律,消除错误观念,构建起更为科学的新概念。 First, the adjustment of cognition, to correct the false preconceptions Most of the students before the concept comes from the student's own life experience and intuitive experience, due to cognitive rules, thinking characteristics, living environment and other influences, making some of these preconceptions is correct, Some are one-sided or even wrong. As a leading teacher, we should seize the opportunity accurately and find ways to create a problem situation that is suitable for students' participation. We should stimulate students to experiment, to think, to analyze and to judge, so as to find out the law and eliminate wrong ideas, New concept of science.