学生从小就爱用小镜子做反光游戏,但小镜子是应用光的反射原理制成的,学生并不一定知晓。如果教师照本宣科,认识镜子的反光原理,学生只能死记硬背不会有深刻的认识理解,更谈不上发展思维,培养能力。如果教师注重挖掘教材,潜心钻研教学,变空洞的说教为执导,学生观察、利用实物进行演示或者进行实地观察,引导学生进行推理、想象,效果就好多了。 Students love to use a small mirror to do reflective games since childhood, but small mirrors are made using the principle of light reflection, and students do not necessarily know. If the teacher according to the propaganda, understanding of the reflective mirror principle, students can only rote memorize without a deep understanding, let alone develop thinking, develop ability. If teachers pay attention to mining textbooks, devote themselves to teaching, turn empty preaching for the guidance, students observe, use physical demonstration or field observation, guide students to reasoning, imagination, the effect is much better.