课堂作为学校最主要的教学场所,受诸多因素的制约,如场所封闭,教学时间有限,师生空间位置相对固定化。有时还受教学设施设备的制约,如缺少投影仪、电脑、录音机等。教师如果不想办法活跃课堂气氛,调动学生的主动性、积极性,一堂课的教学效果,“三维”目标(情感、 Classroom as the school’s most important teaching place is constrained by many factors, such as closed places, limited teaching time, and relatively fixed teacher-student space. Sometimes it is also restricted by teaching facilities and equipment, such as lack of projectors, computers, tape recorders and so on. If teachers do not want to be active in the classroom atmosphere, they will mobilize the initiative and enthusiasm of the students, the teaching effect of one class, and the “three-dimensional” goal (emotional,