教学《电磁铁》一课,我在使用学具前后感受颇深。在使用学具材料前,布置了学生收集制作电磁铁的铁钉、导线、电池等任务。上课时,学生带到课堂上的材料却是五花八门的导线,长短粗细不同的铁钉……就铁钉而言,是否加热烧过也不一致,课前老师布置铁钉必须是加热烧红过的铁钉,可有些学生没有这样做,在实验中,用没有 Teaching “electromagnetism” a lesson, I feel deep before and after using the school. In the use of school materials, arranged before the students to collect the production of iron nails, wires, batteries and other tasks. Class, the students brought to the classroom material is a wide range of wire, the length of the different thickness of nails ... ... on the nails, the heating is not the same burn, pre-class teacher nail arrangement must be heated to burn red Nails, but some students did not do this, in the experiment, with no