一是教学活动前,教师要充分预设一些教师认为在教学过程中教师的关注点应放在教学的动态生成上,无需精心预设和准备。但在实践中,教师对待偶发事件常常束手无策,无法机智应对,白白流 First, before teaching activities, teachers should fully pre-set some teachers that teachers in the teaching process should focus on the dynamic generation of teaching, without careful design and preparation. However, in practice, teachers often do nothing to deal with occasional events, can not be tactful response, vain