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在初中物理教学中,习题与解题训练是一个重要环节通过一题多变、一题多解等变式训练,可帮助学生深刻理解、把握、巩固知识,教师要注重教授学生解题技巧,培养学生的应变能力.一、一题多变,帮助学生触类旁通在教学过程中,一题多变是由多方位、多角度地对习题展开变化,从而引出与习题有关的系列题目,形成多变式导向,帮助学生认识知识,理解知识,巩固知识,学会触类旁通例1如图1,在一电路中,闭合开关S后,灯泡L1与灯泡L2都亮,同时电流表与电压表也都显示示数.而经过一段时间之后,这两个灯泡却突然同时熄灭了,并且电流表与电压表示数都无示数.通过检查,发现除了小灯泡外,其他
In junior high school physics teaching, problem solving and problem solving training is an important link through a variety of topics, multiple solutions and other variants of training to help students understand, grasp, consolidate knowledge, teachers should pay attention to teaching students problem solving skills, First, a problem changeable, to help students touch analogy In the teaching process, a problem is a multi-faceted, multi-angle to the exercises to start a change, which leads to exercises and related topics, the formation of changeable As shown in Figure 1, in a circuit, after the switch S is closed, the light bulb L1 and the light bulb L2 are both on, and both the ammeter and the voltmeter also show the indication number .After a period of time, the two bulbs suddenly went out at the same time, and the ammeter and the voltage that the number of unscreened .After inspection, found that in addition to small bulbs, the other