备课与讲课的艺术备好课要掌握三根线。明线。所谓明线就是教材之线。暗线。所谓暗线就是教材内在的本质的东西。即教材前后左右内在的联系。在备课中一定要花大力气，把教材中的知识、概念、定理、定律等作个总结，找出它们相互之间的联系，井围绕一条主张，把这些知识条... Preparing classes and lecturing the art of a good lesson to master the three lines. Clear line. The so-called open line is the textbook line. Dark line. The so-called hidden line is the essence of teaching materials. That teaching materials around the internal contact. In the lesson preparation must make great efforts to the textbook of knowledge, concepts, theorems, laws and so make a summary, find out the relationship between them, and around a claim, the knowledge of these ...