教学是教与学的交往、互动,是师生之间的对话、交流和知识建构活动。教学不是教师教、学生学的机械相加,而是互教互学,师生间分享彼此的思考、见解和知识,交流彼此的情感、理念,丰富教学内容,求得新的发现,从而达到教学相长的目的。《数学课程标准》明确指出:“在教学活动中,教师要选择恰当的教学方式,因势利导、适时调控,努力营造师生互动、生生互动、生动活泼的课堂氛围,形成有效的教学活动”。可见,在新课程下,学生再也不是盛装知识 Teaching is the interaction and interaction between teaching and learning. It is a dialogue, exchange and knowledge construction between teachers and students. Teaching is not the teaching of teachers, students learn mechanical addition, but each teaching and learning, teachers and students to share each other’s thinking, insights and knowledge, exchange of mutual feelings and ideas, enrich teaching content, obtain new findings, so as to achieve Teaching purpose. “Mathematical Curriculum Standards” clearly states: "In teaching activities, teachers should select the appropriate teaching methods, make the best use of their own circumstances and timely control and strive to create a teacher-student interaction, students interaction, lively classroom atmosphere, the formation of effective teaching activities . Can be seen in the new curriculum, students are no longer dressed in knowledge