一、充分做好教材中设计合理的实验教材中大部分实验质量高,器材齐备,易于操作,效果明显,要充分用好这些实验,进行有效的实验教学,需做到以下两条.1.每一实验,教师都要在课前试做.试做的主要目的是找出实验成功、失败的关键以及常出现的问题,以备上课时心中有数.例如,初三物理中的“对物体做功,物体内能增大”的压燃实验,若不试做上课时便很容易失败,而且失败后越着急压活塞,棉花越难着火,造成尴尬局 First, do a good job in the design of teaching materials in a reasonable experimental teaching materials, most of the high-quality experiment, complete equipment, easy to operate, the effect is obvious, to make full use of these experiments, for effective experimental teaching, need to do the following two.1. For each experiment, teachers must try it out before class. The main purpose of the test is to find out the key to the success of the experiment, the key to failure, and the problems that often arise, so that they are prepared for the class. For example, in the third-year physics, Doing work in an object can increase the compression ignition test inside the object. If you do not try to do the class, it is easy to fail, and after you fail to press the piston, the more difficult it is for the cotton to catch fire.