一、案例背景以科学合理的教学手段提高课堂教学的质量、有效性,这是课堂教学的最终目标。而在课堂中创设良好的问题情境,则恰恰是目前课堂教学的一项重中之重。曾有著名学者说:“创造始于问题,有了问题才会思考,有了思考,才有解决问题的方法,才有找到独立思路的可能。”由此可见,问题情境对于课堂教学的重要性。现阶段,科学有效的问题情境创建不仅是广大化学教师积极探索的一项课题,同时也是实现学生课堂主体,激发学生探索欲望,引导学 First, the case background Scientific and reasonable teaching methods to improve the quality and effectiveness of classroom teaching, which is the ultimate goal of classroom teaching. And in the classroom to create a good problem situation, it is precisely the current classroom teaching a top priority. There have been well-known scholars, said: “Creation begins with the problem, there is a problem before thinking, with thinking, there is a solution to the problem, there is the possibility of finding an independent thinking. ” Thus, the problem situation for classroom teaching The importance of At this stage, the creation of a scientific and effective problem situation is not only a topic actively explored by the vast majority of chemistry teachers, but also the realization of the main body of the students, stimulating students to explore their desires and guiding learning