笔者通过研读教材,查找相关资料,发现“百分数的意义”是一节典型的教学课例,并已形成很多优秀的教学设计,且大部分采用了如下教学模式:实际问题(生活中的百分数)——描述性定义(像……叫百分数)——具体解释(近视率:分母为10018的分数—)——定义(百分数表示……)——100同化(百分数通常不写成分数的形式)——强化(读写、比较分数与百分数的应用)。虽然感觉这种模式 Through studying textbooks and searching for relevant materials, the author found that “the meaning of percentages” is a typical teaching example and many outstanding teaching designs have been formed, most of which adopt the following teaching modes: practical problems (in life Percent) - descriptive definition (like ...%) - specific explanation (myopia rate: fraction of 10018 -) - definition (percentage means ...) - 100 assimilation (percentages are not usually written as a fraction ) - Strengthen (read and write, compare scores and percentage of applications). While feeling this model