在教学中,我们经常会发现课堂上有的教师讲得滔滔不绝,学生却昏昏欲睡;有的教师只为提问而提问,要么设计的问题难度很大,学生无法理解,要么设计的问题没有一定的梯度,不能激发学生的思维,难以调动学生的积极性。这些现象导致师生之间缺乏有效的互动,教学低效。那么,怎样的教学活动才能调动学生的积极性,让他们真正参与到课堂中来呢? In teaching, we often find that some teachers in the classroom speak endlessly and students are drowsy. Some teachers ask questions only, or the design problems are very difficult, the students can not understand or design The problem does not have a certain gradient, can not stimulate students’ thinking, it is difficult to mobilize the enthusiasm of students. These phenomena led to the lack of effective interaction between teachers and students, teaching inefficient. So, what kind of teaching activities to mobilize the enthusiasm of students, so that they really participate in the classroom come from?