一、从学生的生活经验或已有的知识背景出发引入概念一个概念在学生思想上的形成是有一个过程的,教学中教师应从具体到抽象,从现象到本质,引导学生逐步形成。有效的数学教学应当从学生的生活经验和已有的知识背景出发,向他们提供从事数学活动的机会,在活动中引导学生积极自主探 First, from the student’s life experience or existing knowledge background to introduce a concept in the formation of a student’s thinking is a process, teachers in teaching should be from the concrete to the abstract, from the phenomenon to the essence, guide students to gradually form. Effective mathematics teaching should start from students’ life experiences and existing knowledge backgrounds, provide them with opportunities to engage in mathematics activities, and guide students to actively and independently explore during the activities.