著名数学家和教育家G.波利亚有一句脍炙人口的名言:“掌握数学就是意味着善于解题,不仅善于解一些标准的题,而且要善于解一些要求独立思考、思路合理、见解独到和有发明创造的题。”然而现实中很多高中生虽做了大量的题,但离开了参考答案和老师,总是没法独立地、完整地解出一道题,他们“一听就懂、一做就错”。造成这种现象的原因之一就是数学老师在课堂上只注重“我是否 Well-known mathematician and educator G. Polia has a popular saying: ”Mastering mathematics means being good at solving problems, not only being good at solving some standard questions, but also being good at solving some problems that require independent thinking, reasonable thinking and unique opinions And there are problems of invention and creation. “However, in reality, many high school students have done a lot of questions, but left the reference answers and teachers, always can not independently and completely solve a problem, they Understand, one done wrong ”. One of the reasons why this phenomenon is caused is that math teachers only focus on the classroom "Do I?