课堂教学离不开教师与学生之间、学生与学生之间的讨论、交流等活动。讨论活动成为小学数学学科课堂教学的重要活动形式之一。教育实践学认为,讨论活动的开展,有利于小学生主体特性的展现,有利于小学生数学思维的训练,有利于小学生社会交际能力的培养。新实施的小学数学课程标准指出:“教学活动就其本质是群体性活动,需要教师与学生的全程参与、深入互动。应提供双边交流讨论的时机和话题,重视讨论活动的引导,提高教 Classroom teaching is inseparable from the teacher and student, student and student discussions, exchanges and other activities. The discussion activity has become one of the important activities in the classroom teaching of mathematics in primary schools. Educational practice believes that the discussion activities are conducive to the development of the primary characteristics of primary school students, is conducive to primary school students mathematical thinking training, is conducive to the cultivation of primary school students’ social communicative competence. The newly implemented primary mathematics curriculum standard states: ”Teaching activities are essentially group activities and require the full participation and interaction of teachers and students. Time and topics for bilateral exchange and discussion should be provided, guidance of discussion activities should be emphasized, teaching should be enhanced