新课标下如何HOLD住中下层班级学生对化学的学习热情

How to HOLD Middle and Lower Class Students＇ Enthusiasm in Learning Chemistry under the New Curriculum

课堂教学是艺术，课堂管理也是艺术，课堂管理的目的就是使学生注意力集中，从而很好地完成教学任务。那么化学课堂上教师如何控制学生的注意呢？尤其是对一些中下层班级的教学，怎样才能HOLD住学生们对化学的学习热情？

Teaching in the class is a kind of art and so is the class management.The aim of the class management is to drew students attention to accomplish the teaching task.Then how to control students＇ attention in chemistry class？ Especially for some of lower-middle-class students, how can we hold their enthusiasm of chemistry studying？