同济大学陆敬严教授深刻指出:“教师的工作,一靠说,二靠写。”说,就是讲解;写就是板书。一堂数学课上得成功与否,讲解是一个重要方面;但板书也是至关重要的。因为正确、具体、形象的板书可以帮助学生从大量的感性材料中推导出数学公式、法则、定律来,帮助学生正确理解和牢固掌握数学知识。 Professor Lu Jingyan of Tongji University profoundly pointed out: “Teacher’s work, one by the said, the second by writing. ” That is to explain; write is a blackboard. The success of a math class is an important aspect to explain; but a blackboard is also crucial. Because the correct, concrete, and image of the board can help students deduce mathematical formulas, laws and laws from a large number of perceptual materials to help students correctly understand and firmly grasp the mathematical knowledge.