现代教学论认为,一个完整的导入环节由集中注意引起兴趣、激发思维、明确目的、进入学习课题五方面构成。要想使学生的兴奋中心转入课堂教学,首先就必须集中学生的注意力,这是导入新课的第一步,“兴趣是最好的老师”,只要学生对学习产生兴趣,他就会积极 The modern teaching theory believes that a complete introduction link consists of focusing attention on five aspects of interest, inspiring thinking, clarifying purpose, and entering the topic of study. In order to transfer the center of excitement of students to classroom teaching, students must first focus their attention. This is the first step in the introduction of new classes. “Interest is the best teacher”. As long as students are interested in learning, he will positive