中学生初上物理分组实验课，对实验课的新奇与兴趣，或对实验仪器的新鲜感，都易使他们的思维偏离实验课的正确轨道.有的同学只顾玩或看热闹，忘记了上实验课的宗旨；还有的同学想做却又不知从何着手，面对实验台上摆放的诸多的实验器材和仪器茫然不知所措.时间在不知不觉中过 Middle school students in the first physical group experimental class, novelty and interest in experimental class, or the freshness of experimental apparatus, are easy to make their thinking deviate from the correct course of experimental class.Some students only play or watch the fun, forget the experiment The purpose of the lesson; there are some students want to do but do not know where to start, in the face of the experimental platform placed a lot of experimental equipment and instruments at a loss overwhelmed by the time unknowingly