一、存在的问题新课程提倡积极构建以学生为主体的新的课堂教学结构,转变教学方式,提高课堂教学效益,减轻学生负担。然而实施情况并不理想,在我们的化学课堂上还经常看到这样的场面:教师站在讲台上讲得眉飞色舞,而台下的学生却听得昏昏欲睡,整个课堂显得 First, the existing problems The new curriculum advocates to actively construct a new classroom teaching structure with students as the main body, change teaching methods, improve the efficiency of classroom teaching and reduce the burden on students. However, the implementation is not ideal. In our chemistry class, we often see such scenes: teachers stand on the podium for exaggeration, while the audience listened to the drowsiness of the classroom, the whole class appears