数学是抽象性、逻辑性很强的学科。小学生的思维正处在由具体形象思维为主向抽象思维能力发展的阶段。学生动手操作学具能架起沟通知识的抽象性和思维的形象性之间的桥梁,也有助于积累数学活动经验。目前,广大数学教师已充分认识到操作的价值并重视让学生通过动手操作来获取知识、提高能力、感悟思想方法,也对如何提高操作教学的有效性进行了许多积极的探索。然而,许多老师并未认识到教师“下水”操作在操作教学中的重要作用。语文老 Mathematics is an abstract, highly logical discipline. The thinking of primary school students is in the stage of development from abstract thinking to concrete thinking. Students hands-on learning tools can bridge the gap between the abstraction of communicating knowledge and the image of thinking, as well as accumulating experiences in mathematical activities. At present, the majority of math teachers have fully realized the value of the operation and placed emphasis on letting students acquire knowledge, improve their abilities, and acquire ideas and methods through hands-on operations, and also conducted many positive explorations on how to improve the effectiveness of operation teaching. However, many teachers do not recognize the important role of teachers in teaching operations. Old language