近期,我校开展同课异构活动,六年级有两位教师上的是“圆的周长”一课。他们把参考书中提供的教学目标“在测量活动中探索发现圆的周长与直径的关系,理解圆周率的意义及圆周长的计算方法”作为教学重点。上课教师注重经历测量的过程,让学生通过绕线法、滚动法,在绕一绕、滚一滚的过程中探索发现圆的周长与直径的关系。教师甲直奔主题:同学们,让我们动手测一测 Recently, our school carries out the same course heterogeneous activities, the sixth grade has two teachers on the “circle circumference ” lesson. They took the teaching objective provided in the reference book as a probe into the relationship between measuring the circumference of a circle and its diameter in measurement activities, and the method of calculating the meaning of the circumference and the circumference. Class teachers pay attention to experience the measurement process, so that students through the winding method, rolling method, around a winding, rolling in the process to find the circle perimeter and diameter relationship. Teacher A went straight to the topic: students, let us test a measure