《数学课程标准》指出:“数学活动是师生共同参与、交往互动的过程。”有效的数学教学活动是教师教与学生学的统一,学生是数学学习的主体,教师是数学学习的组织者与引导者。可是,在教学实践中,我们却发现数学课堂,尤其是农村小学高年级数学课堂,已然沦落为个别同学的表演 The standard of mathematics curriculum states that mathematics activities are the process of mutual participation and interaction between teachers and students. "Effective mathematics teaching activities are the unification of teacher teaching and student learning. Students are the main body of mathematics learning and teachers are maths learning Organizer and guide. However, in teaching practice, we find that math classrooms, especially the upper-class mathematics classrooms in rural primary schools, have been reduced to performances by individual students