“万事贵乎始”。精彩的新课导入,不但会引起学生的注意,引发学习动机和兴趣,还能达到承前启后,建立知识联系的作用。化学课堂教学是一个整体,新课导入是教学的第一环节。它的主要任务是要使学生明确本节课所要学习的主要问题,并激发学生的学习兴趣和求知欲,从而提高课堂效率。高尔基谈到创作体会时说:“开头第一句是难的,好象音乐里的定调一样,往往要费好长时间才能找到它。”新课导入方式很多,但没有固定的模式,它因人而异, “Everything is precious”. Wonderful introduction of new courses will not only attract the attention of students, triggering the motivation and interest in learning, but also reach the goal of building a knowledge link. Chemistry classroom teaching is a whole, the introduction of new course is the first part of teaching. Its main task is to make students clear the main issues to be learned in this lesson and to stimulate students’ interest in learning and curiosity so as to improve classroom efficiency. Gorky talked about the creation experience: “The first sentence at the beginning is difficult, as if the tone of the music, often take a long time to find it.” "The new lesson into a lot of ways, but there is no fixed pattern It varies from person to person