“动手实践、自主探索与合作交流是学生学习数学的重要方式”的思想伴随着课程标准实践而深入人心。作为实践环节的操作理应具有数学学科的特点,从操作符合内需和与思维对接,也就是要让学生明确“我们为什么要操作”“怎样结合操作过程和结果进行数学思维”。笔者就教学中涉及的实例来谈谈“为什么操作”。一、发现学习理论的呼唤美国著名心理学家布鲁纳所倡导的“发现学习”是一种学习者自己去发现教材结构、结论和规 “Hands-on practice, independent exploration and cooperation and exchange is an important way for students to learn mathematics ” thought with the practice of curriculum standards and enjoys popular support. As a practical part of the operation should have the characteristics of mathematical disciplines, from the operation of domestic demand and docking with thinking, that is, to make students clear “Why do we operate ” “How to combine the operation process and the results of mathematical thinking ”. The author talks about the examples involved in teaching “Why operation ”. First, the discovery of the call of learning theory advocated by the famous American psychologist Brunner “discovery learning ” is a learner to discover the textbook structure, conclusions and rules