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年轻教师常常说:“数学课本的知识简单,内容少,例题、练习、习题也无多大的难度,所以每节课的教学时间都显得特别多.”其实不然,课本中每一道例题、习题都是经过专家的反复琢磨、认真筛选、精心设计的,具有典型性、代表性、示范性,如同一瓶浓缩的精油,蕴含着丰厚的知识、技巧、技能.因此,教学不能停留在课本知识、例题、习题的表面,而要深入其实质,更重要的是要对课本知识尤其是例题、习题进行挖掘、引申,把着眼点放在优化例题、习题上,突出对例题、练习、习题的剖析、变式、延伸、拓展等优化中,这样不但可以减轻学生繁重的学习负担,拓展学生的
Young teachers often say: “Mathematics textbook knowledge is simple, less content, examples, exercises, exercises are not much difficulty, so the teaching time of each lesson are particularly large.” "In actual fact, every case of the textbook, Exercises are carefully pondered by experts, carefully selected, carefully designed, typical, representative, exemplary, as a bottle of concentrated essential oils, contains a wealth of knowledge, skills, skills.Therefore, teaching can not stay in the textbook Knowledge, examples, the surface of exercises, but to go deeper into its essence, more important is to textbook knowledge, especially the examples, exercises mining, extension, the focus on optimizing examples, exercises, highlighting the examples, exercises, exercises Analysis, variant, extension, expansion and other optimization, so that not only can reduce the student’s heavy learning burden and expand students’