数学教学中变式训练的运用平罗县前进中学杨学礼正确组织变式训练，是提高课堂效率的重要途径．变式训练是指变换问题中的条件或结论，转换问题的形式或内容，变更概念中的非本质特征，使概念、问题本质不变的训练。对于每节课来说，都有可变的东西和不可变的东西．不变的... The use of variant training in mathematics teaching Yang Hsueh-Li, a middle school in Pingluo County, correctly organizes variant training is an important way to improve classroom efficiency. Variant training refers to changing the conditions or conclusions in the question, changing the form or content of the question, changing the non-essential features in the concept, and training the concepts and questions in essence. For each lesson, there is something variable and immutable. Changeless...