巧用课堂的生成性资源,使之成为激活思维、促进思考的最直接素材,既能激发学生参与探究的热情,又能提升学生对学习的关注,使高效课堂、有效学习的目的逐渐成为现实。下面,通过“长方形的认识和周长”一课的教学,谈谈如何灵活驾驭课堂,提高课堂教学实效。1.让学生把事做完在学生认识“长方形是由四条线段围成的图形”后,教师设计“摆一摆”的实践活动,让学生自主选择材料(2组长度一样的4根小棒)。交流展示活动中,很多学生都展示出 Using the productive resources of the classroom skillfully makes it the most direct material for activating thinking and promoting thinking. It not only stimulates the enthusiasm of students to participate in inquiry, but also enhances students’ attention to learning so that the purpose of efficient classroom and effective learning becomes a reality gradually . The following, through the “rectangular understanding and circumference ” class teaching, talk about how to flexibly control the classroom, improve classroom teaching effectiveness. 1. Let the students do the things done in the students “rectangle is surrounded by four lines of graphics ”, the teacher design “pendulum ” practice activities, allowing students to choose their own materials (two groups of the same length 4 small sticks). During the exchange show, many students showed it