《磁铁》这一课的重点是要儿童通过实验,认识磁铁的性质。难点是总结实验,归纳出磁铁的性质。只有在深刻地认识了磁铁的性质后,才能较顺利地较完全地归纳出磁铁的性质。上课时,教师先应出示各种形状的磁铁:条形磁铁、蹄形磁铁、圆形磁铁(可从坏的动圈喇叭中得到)及磁针等。让儿童观察,要他们根据形状给它们命名。同时,要他们注意磁铁上(条形,蹄形、磁针)的颜色和标的字母。可在此时,告诉他们读“N”和“S”,但这表示什么意思,则应让他们在实验中自己去发现,使儿童在好奇心的使驱下,带着这团疑云 The focus of this lesson is to ask children to experiment and understand the nature of the magnet. The difficulty is to sum up the experiment, summed up the nature of the magnet. Only after a profound understanding of the nature of the magnet can more completely and completely sum up the properties of the magnet. In class, the teacher should first produce a variety of shapes of magnets: bar magnets, hoof magnets, circular magnets (available from the bad dynamic speaker) and magnetic pin. Let the children observe, asking them to name them according to the shape. At the same time, ask them to pay attention to the magnet (bar, shoe, needle) color and the letter. At this point, tell them to read “N” and “S,” but what does it mean? Let them try to find out in their own experiments that the children are driven by curiosity