1 精心设计有趣的实验,激发兴趣 古人云:学起于思,思源于疑。有了疑问就能产生好奇心,有了好奇心就有了探索问题的兴趣。在自然教学中,教师如能根据自然课的特点,通过生动有趣的实验设疑陈难,引导学生求知解惑,从而体验学习的乐趣,就能达到事半功倍的效果。一位教师在讲《大气的压力和浮力》一课前,引入新课时,做了这样一个 A well-designed fun experiment, to stimulate interest An ancient saying: learning from the thought, origin of doubt. With doubt, you can have curiosity, and with curiosity you have the interest of exploring the problem. In the teaching of nature, if teachers can set up a difficult task according to the characteristics of nature class through vivid and interesting experiments, guide the students to know the doubts so that they can experience the fun of learning and achieve the result with less with more effort. A teacher in the “atmosphere of pressure and buoyancy,” a class before the introduction of a new lesson, made such a