“21世纪的文盲是不会学习的人”.因此,改善学生的学习方式是数学课程标准强调的根本任务之一.而自主学习是我校着力打造的改善学生学习方式的重大课题.在这一课题中,其实最重要的一点,就是前课的设计与处理问题.实践研究发现,在前,精心设置开放性问题,对于学生自主学习的深度有重大影响,而且效果很好.一、典型案例例如,在讲“分式的基本概念”时,我给出如下式子:A= “The illiteracy in the 21st century is the one who can not learn ” Therefore, to improve the learning style of students is one of the basic tasks emphasized in the standard of mathematics curriculum, and autonomous learning is a major issue for our school to improve the way of learning for students. In this subject, the most important point in fact is the design and processing of the previous course.Practical studies have found that setting the openness issue in the past has a significant impact on the depth of student self-learning and works well. For example, in the basic concept of fractional expression, I give the following formula: A =