“圆的认识”这堂课,我放在两个场地进行。前半课时,我让学生在教室里认识圆及怎样画圆;后半课时,在操场组织学生活动,让学生在活动中画圆。以下是后半课时的教学片断:师:同学们已经掌握了用圆规画圆的方法,现在老师想请大家到操场上画几个可以做“丢手绢”游戏用的圆,希望各小组先设计方案,再 “Circle of understanding ” This class, I put in two venues. In the first half of the class, I asked the students to recognize the circle and how to draw a circle in the classroom. In the second half of the class, students were organized on the playground for students to draw a circle during the activity. The following is the second half of the class teaching pieces: Teacher: Students have mastered the method of drawing a circle with a compass, and now the teacher would like to invite you to the playground to draw a few can do “throw handkerchief” game circle, I hope the team First design plan, then