在数学课堂教学活动中,新知识的引入这一环节是不可避免的,授前引入是教师在某些知识传授前巧妙地设计出一个引入过程,以激发学生的学习兴趣,提高教学效果,从原则和方法两个方面阐述了数学知识的“授前引入”。 In mathematics classroom teaching activities, the introduction of new knowledge is inevitable. Pre-introduction is the introduction of pre-kindergarten teachers skillfully to design an introduction process to stimulate students interest in learning and improve teaching effectiveness, from Principles and methods of mathematical knowledge on the two aspects of “pre-introduction”.