针对中学数学探究性学习的特点,以问题为中心,构建不同的问题系列和教学模式来激发学生学习兴趣是教师必须要解决的问题。在中学数学教学过程中,换元法是非常重要的数学思想,以换元为手段进行数学教学就是要把具体的数学问题通过转化与化归,最终达到简化并得出结果的过程,培养学生以换元为手段的转化与化归思想就是要提高学生的实际解题能力和对数学思想的深刻理解与把握。 In view of the characteristics of inquiry learning in middle school mathematics, it is a problem that teachers must solve to construct a series of different questions and teaching models to stimulate students’ interest in learning. In the process of mathematics teaching in secondary schools, the method of changing Yuan is a very important mathematical thought. To change mathematics teaching by means of changing yuan, it is necessary to transform the concrete mathematics problem into the process of transforming and reorganization, To change the yuan as a means of conversion and return to the idea that is to improve students’ ability to solve practical problems and profound understanding and grasp of mathematical thinking.