“非预设性教学”是新课程课堂教学中一个最重要的特征。水到渠成的效果固然好,节外生枝的课堂意外也属正常。所以,当课堂节外生枝时,教师不能回避或者不假思索地匆忙答复,而是将这种意外及时纳入预设的教学中,并且调整教学策略,重构课堂动态生成。只有这样,才能化为课堂上一次次的精彩。利用学生质疑生成课堂中,常常会出现一些意想不到的质疑,而这些质疑却往往是一些极有 “Non-prescriptive teaching ” is one of the most important features of classroom teaching in the new curriculum. The natural result is good, extracurricular class accident is normal. Therefore, when the classroom is excused, the teacher can not avoid or hesitate to reply without hesitation. Instead, he puts the accident into the preset teaching timely and adjusts the teaching strategy so as to reconstruct the dynamic development of the classroom. Only in this way, can become the wonderful time and time again in the classroom. The use of student questioning generated in the classroom, there are often some unexpected questions, but these questions are often very much