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周期现象是有规律的现象,规律表现为一种周而复始、循环出现的结构,这种确定的结构是现象的周期。周期现象的教育价值在于培养学生发现规律、遵循规律、利用规律的精神,通过眼前预料以后、通过部分把握整体、通过有限想象无限。如何教给学生发现周期,并体会它的确定性是认识周期现象的关键,让学生能根据规律确定某个序号所代表的是什么物体或图形是本节课的难点。这节课(苏教版教材五年级数学上册)笔者是这样设想的:一、教学过程1.创设情境,发现规律,揭示课题,感知物体的有序排列。①出示有规律的小动物的排列,猜猜下面一个小动物!发现有规律的
Period phenomenon is a regular phenomenon, the law appears as a recurring cycle of the structure, the structure of this determination is the phenomenon of the cycle. The educational value of the cycle phenomenon lies in cultivating students to discover the law, following the law, utilizing the spirit of the law, passing through the immediate anticipation, and partially grasping the whole through the limited imagination. How to teach students to find the cycle, and understand its certainty is the key to understanding the periodic phenomenon, so that students can determine according to the law of a serial number is what objects or graphics is the difficulty of this lesson. This lesson (Jiangsu textbook fifth grade mathematics volumes) The author is envisaged: First, the teaching process 1. Create a situation, discover the law, reveal the subject, perceived objects arranged in an orderly manner. ① produce a regular arrangement of small animals, guess the following a small animal! Found that regular