质疑即提出疑难问题。激发学生质疑可以集中学生注意力,提高学习兴趣;可以启发思维,发展智力;可以反馈评价,调控教师的教学;也可以引导学生的思考方向,扩大思维广度,提高思维层次,但更重要的在于可以让学生学会如何学习,如何思考。作为中学化学教师, Questioning asks difficult questions. Inspiring students’ questions can focus students’ attention and improve their interest in learning; they can inspire thinking and develop intelligence; they can feedback evaluation and control teachers’ teaching; they can also guide students’ thinking direction, expand their breadth of thinking, and improve the level of thinking, but more importantly, Students can learn how to learn and how to think. As a middle school chemistry teacher,