论文部分内容阅读
圆周长的教学,重点是圆周率的教学。由于小学生受年龄和知识水平的限制,他们对圆周率的学习颇感困难。我们试用类比、演示、实验、讲解等方法,学生能很快理解和掌握这一常教。首先,利用学生已有知识,让他们发现变化着的数量中存在着不变的因素。教学开始,教师说:“人的眼耳鼻口七孔称为七窍。一个人有10个手指7个窍。两个人共有几个手指几个窍?三个、四个…人呢”随学生口答,出示 10指,20指,30指, 7窍;14窍;21窍;
Circumference of teaching, the emphasis is on the teaching of pi. Because pupils are limited by their age and knowledge, they find it difficult to learn PI. We try analogies, demonstrations, experiments, explanations and other methods, students can quickly understand and master this common teaching. First, make use of the existing knowledge of students so that they find that there is a constant factor in the number of changes. Teaching began, the teacher said: “The human eye ear and nose and mouth seven holes called Qiqiao. A person has 10 fingers 7 orifices. A total of several fingers for two people? Three, four ... People?” , Show 10 means, 20 means, 30 means, 7 orifices; 14 orifices; 21 orifices;