一、前言《九年义务教育三年制初中教科书:物理》第八册第四、五节分别设计了“电阻的串联”和“电阻的并联”两部分内容。借助欧姆定律向学生展现了神奇的“等效代替法”,引起了学生的浓厚兴趣和强烈的求知欲。在这一部分的教学过程中,适时适度地补充一些较高层次的内容,不仅有利于学生夯实基础,提高竞争力度,更能为他们今后的学习做好铺垫。 I. Preface The fourth and fifth quarters of Book 8 of the 9-year Compulsory Education Junior Middle School Textbook: Physics have designed two parts: “series connection of resistors” and “parallel connection of resistors”. Using Ohm’s Law to show students the miraculous “equivalent substitution method” has aroused students’ keen interest and strong desire for knowledge. In this part of the teaching process, supplementing some of the higher-level content in a timely and appropriate manner will not only help students lay a solid foundation, increase their competitiveness, but also prepare them for their future learning.