在基础教育新课程的背景下,以“促进学生发展、教师提高和改进教学实践”为目的的课堂教学改革受到越来越多的关注和重视。建构主义教学理论的核心是:以学生为中心,强调学生对知识的主动探索、主动发现和对所学知识意义的主动建构。日前,笔者指导并观摩了北京农业大学附属中学赵启程老师的一节《直线与椭圆的位置关系》海淀区公开课,课堂教学采用“小组合作学习”的形式,在教师指导下,让学生动起来,有效地培养了学生的 In the background of the new curriculum of basic education, the reform of classroom teaching based on “promoting student development and teachers improving and improving teaching practice ” has drawn more and more attention and attention. The core of Constructivism teaching theory is: Students as the center, emphasizing students’ active exploration of knowledge, take the initiative to discover and take the initiative to construct the meaning of knowledge. A few days ago, the author instructed and observed a section entitled “Position Relationship between Line and Ellipse” of Zhao Qicheng, a high school affiliated to Beijing Agricultural University. In the open class of Haidian District, classroom teaching adopted the form of “group cooperative learning”. Under the guidance of teachers, Students move to effectively train students