教科版《科学》第四册《电》单元教学时,学生对于连接导线、电珠几乎着迷了。他们不仅在课堂上连接,还在课外捣鼓实验盒,以致在探究使用电路检测器这课时终于碰到了一个普遍性的大问题———大部分所配的带线的小电珠已被“破坏”,只能使用一般电珠。可这样一来,小电珠下面的那 Textbook “Science” Volume IV “electricity” unit teaching, students connect the wires, beads almost fascinated. Not only were they connected in class but they also crunched experimental boxes outside of class so that they finally encountered a common big problem when they explored the use of circuit detectors - most of the dispensed small beads with wires had been “destroyed” , Only use ordinary electric ball. That way, the small ones below that