“教什么”是有效开展数学课堂教学的前提,在决定教学成败中起着极其重要的作用。张奠宙教授在《组织数学教学要多关注数学内容》一文中说:“数学教学的成败,首先要关注数学内容的阐述是否正确与合理,学生是否能够真正理解相关数学内容的本质。”因 “What to teach ” is a prerequisite for carrying out mathematics classroom teaching effectively, plays an extremely important role in determining the success or failure of teaching. In his article “Organizing Mathematics Teaching to Pay Attention to Mathematics Contents”, Professor Zhang Dinun said: “The success or failure of mathematics teaching must first be concerned with whether the description of mathematical content is correct and reasonable and whether students can really understand the essence of the relevant mathematical content.”