最近,我校骨干教师毛元枝为全校数学教师讲了一节公开课,课题是《圆的周长》(人教版课标实验教材《数学》六年级上册)。全课分为四个部分:一是认识圆的周长:二是通过正方形周长与圆周长之间的关系来猜想圆的周长与它直径之间的关系:三是教学圆周率;四是圆周长公式及其应用。整节课以问题串联始终,教 Recently, Mao Yuanzhi, a key teacher in our school, gave an open lesson for math teachers in the school. The topic is “Circumference” (PEPC6 Mathematics). The whole lesson is divided into four parts: one is to understand the perimeter of the circle: the other is to guess the relationship between the perimeter of a circle and its diameter by the relationship between the perimeter of the perimeter and the perimeter: Circle circumference formula and its application. The whole class to the problem always, teach