教学内容《长方形和正方形的周长》是九年义务教育六年制小学数学(苏教版)三年级上册的内容。它是在前一课经历许多测量实践活动并了解周长的一般意义(并未给周长下定义)的基础上进行的。教学目标1.能够探索并掌握长方形、正方形周长的多种计算方法,会解决简单实际问题。2.培养主动精神和抽象概括能力。教学流程 Teaching content “perimeter of the rectangle and the square” is the content of the third grade of the nine-year compulsory education six-year elementary school mathematics (Sujiao edition). It was based on the experience of many measurements in the previous lesson and the general significance of the perimeter (without defining the perimeter). Teaching Objectives 1. To explore and grasp the rectangular, square circumference of a variety of calculation methods, will solve the simple practical problems. 2. Develop self-motivation and abstract abilities. Teaching process