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一、教材的背景和设计意图“电路出故障了”是教科版四年级下册“电”单元中的第四课,是本单元承前启后关键的一课。在前面有关电的学习中,学生已经对电、电路、和电路的连接有了初步的掌握。在学习第三课“让更多的小灯泡亮起来”时,学生发现在需要连接更多小灯泡并让它们发亮的时候,一个地方连接不好或者一个器材出了问题,都有可能导致灯泡不亮,在这样的问题下就引出了“电路出故障了”
First, the textbook background and design intent “Circuit failure ” is the fourth edition of the fourth edition of the textbook “electricity ” unit in the fourth lesson is the key lesson of this unit. In the previous study on electricity, students had a preliminary grasp of electrical, circuit, and circuit connections. While learning Lesson 3, “Let More Light Bulbs Light up,” students found that when there was a need to connect more small bulbs and make them shiny, a place was not well connected or an equipment was having problems May cause the light bulb is not bright, in such a question leads to the “circuit failed”