《小学数学课程标准(实验稿)》在解决问题中提出:“(使学生)初步学会从数学角度提出问题、理解问题,并能综合运用所学知识解决问题,发展应用意识。”心理学研究认为:人的认识水平可划分为三个层次:已知区、最近发展区和未知区。人的认识水平就是在这三个层次之间循环往复、不断转化、螺旋式上升。笔者以“三区”理论为指导,在小学数学课堂 “Elementary mathematics curriculum standard (experimental draft)” put forward in the solution to the problem: “(to make students) initially learn to put forward the problem from the mathematical point of view, understand the problem, and can comprehensively use the knowledge to solve the problem, the development of application awareness. Studies believe that: people’s level of understanding can be divided into three levels: the known area, the recent development and unknown areas. The level of human cognition is the cyclic reciprocation between the three levels, continuous transformation and spiraling. The author of ”three areas " theory as a guide in the elementary mathematics classroom