一、精心设置课题导入,孕育课堂序幕高潮序幕,也称“引子”或“楔子”。原为戏剧名词,指某些多幕剧置于第一幕之前的一场戏。通常用以人物之间的关系,人物所处的时代背景以及事件发生的原因等。课题导入是一节课的开始,通常的做法是以某种特定事物以背景来创设体现课题知识与方法的问题情境,因此引申为课堂教学序幕。课题导入的教学意图主要有两个:一是让学生大致了解本节课所要解决的问题,以引起学生 First, carefully set the subject to import, give birth to the orgasm of the prelude to the classroom, also known as “lead ” or “wedge ”. Formerly a theater term, it refers to a scene where some multi-screen plays are placed before the first screen. Usually used to the relationship between the characters, the characters in the background of the times and the reasons for the incident. The introduction of the subject is the beginning of a class, the usual practice is to create a problem context that reflects the knowledge and method of the subject with a specific object in the background. Therefore, the introduction of the topic is the prelude to classroom teaching. There are two main teaching intentions into the subject: First, let the students know about the problems to be solved in this lesson in order to arouse the students