在我们的课堂上,通常存在着一些“干扰因素”。有的“干扰因素”是教师有意设置的,它能使学生对知识的理解更加到位,从而达到为课堂服务的目的。也有一些“干扰因素”是在教师预设之外出现的,它会干扰教学正常进行,使学生的反应与预设背道而驰,教学时间不断流失,教学效果大打折 There are usually a few “distractions” in our class. Some “interference factors” are intended by teachers, which can make students understand the knowledge more in place, so as to achieve the purpose of serving the classroom. There are also some “disturbing factors” that appear outside the teachers’ preconditions. They interfere with the normal teaching and make the reaction of the students run counter to the presetting conditions. The teaching time is continuously lost and the teaching effect is greatly discounted