儿童的抽象思维水平有限,决定了他们学习数学时要依据已有的知识或经验建构新的数学知识,从而不断提高数学思维水平。“因数与倍数”一课中的因数、倍数概念,数学味浓,概念的现实背景不强。教师要根据这个内容特点,结合儿童学习数学的心理特征设计教学方案,才能取得理想的效果。李老师在教学中,充分利用学生已有的知识和经验——100以内的除法,唤起学生的记忆,并巧妙运用到因数、倍数的教学中,为学生架起了学习因 The limited level of abstract thinking of children determines that when they study mathematics, they must construct new mathematical knowledge based on existing knowledge or experience so as to continuously improve the level of mathematical thinking. “Factor and multiple ” lesson in the factor, multiple concept, mathematical flavor, the concept of the reality of the background is not strong. Teachers according to the characteristics of this content, combined with the psychological characteristics of children’s learning mathematics to design teaching programs, in order to achieve the desired effect. In teaching, Li makes full use of the existing knowledge and experience of the students - the division within 100 to evoke the memory of the students and cleverly apply it to the teaching of factors and multiples, so as to foster students’ learning