多数抽象的数学概念,我们可以为其找到具体的模型。在教学过程中,教师可以通过对具体模型的学习和认识来帮助学生掌握抽象概念的性质及特点,具体模型的建立有助于学生对抽象概念产生形象的认识。对具体模型的操作和学习可以看做是概念抽象和建构前的操作活动。所以,我们可以通过为抽象概念建立具体模型,促 Most abstract mathematical concepts, we can find a specific model for it. During the teaching process, teachers can help students grasp the nature and characteristics of abstract concepts through learning and understanding specific models. The establishment of specific models helps students to recognize the abstract concepts. The operation and learning of concrete models can be regarded as conceptual abstraction and pre-construction operational activities. So, we can build concrete models of abstract concepts and promote them