在课堂中使学生产生情绪高昂和思维活跃的状态,有赖于“问题情境”的启发引导.创设符合学生认知水平、有趣味、开放的问题情境,不仅在一课的引入阶段非常重要,而且要随着教学过程的展开,连续不断地引出新情境,并形成几个高潮,以激发学生的数学思维,使他们兴趣盎然地投入学习. Making students feel emotional and active in the classroom depends on the “problem situation” inspiring. Creating problem situations that meet the students’ cognitive level, interest, and openness is not only important in the introduction phase of a lesson. , but also with the unfolding of the teaching process, continuously lead to new situations, and the formation of a few climax, in order to stimulate students’ mathematical thinking, so that they are full of interest into learning.