认识事物往往都是从特殊的入手,然后逐步一般化;再在一般的指导下更加深入地认识某些特殊的事物。学习数学往往也离不开这条总的认识规律:特殊—一般—特殊,循环往复,以至无穷。在苏教版三年级下册《认识分数》这一单元的教学中,发现教材中有几处知识的呈现是从“特殊到一般”的顺序编排的,然而在实际教学中却成了学生学习的瓶颈,制约影响了学生对知识的理解与掌握。于是设计出了一条从“一般到特殊”的教学顺序,将本单元中一个板块的内容进行阐述。 Knowing things are often from a special start, and then gradually generalized; and then under the guidance of general more in-depth understanding of certain special things. Learning mathematics is often inseparable from this general rule of understanding: special - general - special, reciprocating, and even infinity. In the teaching of the unit of “Cognitive Score” in the third grade of the Sujiao Version, it was found that the presentation of several pieces of knowledge in the textbook was arranged in the order of “special to general”, but in actual teaching it became The bottleneck of student learning, constraints affect the students understanding and mastery of knowledge. So I designed a teaching sequence from “General to Special” and explained the contents of one section of this unit.