概念教学主要是通过典型的“标准式”例题抽象出认识对象的本质属性。教学中,为了加深学生对概念的理解,还应在学生初步掌握概念本质属性后,搜集学生常出现的错误并加工整理成相关题目,采取“变式”与“反例”形式来辅助概念教学。一、似非而是,拨开云雾见天日“变式”通常是指认识对象的表面形式有所变化,而本质属性不变的例题或练习题,它的主要特征是“似非而是”。这样的教学内容 Concept teaching is mainly through the typical “standard ” example abstract understanding of the essential attributes of the object. Teaching, in order to deepen the students’ understanding of the concept, students should also grasp the nature of the concept of the initial grasp of the students often appear errors and processed into related topics, to take “variant” and “counter-example” form Aided concept teaching. First, the paradox is to cloud the clouds to see the sun “Variant ” usually refers to the surface of the object of understanding of the change in the form, but the essence of the same example or practice exercises, its main characteristic is Yes". Such teaching content