一、论题的提出知识的火花来源于实践,来自瞬间,稍纵即逝,抓住了,就可能闪出光芒。教学中,我班二年级一名学生,在作业中,只能计算到十以内的加减法,还要掰手指计算,一牵扯到二十以内的加减法时,完全摸瞎。同一个题,今天做的和昨天做的会出现不同的答案,而且根本没一点章法,简直是乱写的一个数字。我很头痛。开始我让她画“杠杠”进行加减练习,练了一段时间,一 First, the topic of the proposed spark of knowledge comes from practice, from the moment, fleeting, seize, it may flash light. Teaching, a class I sophomore in a job, can only calculate the addition and subtraction within ten or less, but also breaking the fingers calculation, a deduction of less than twenty within the law, completely blind touch. The same question, today and today will be different answers to do, and there is no chapter law, is simply a random number. I am a headache. At the beginning I let her draw “Leverage ” for addition and subtraction exercises, practiced for a period of time, one