《数学新课程标准》指出:数学教学应从以获得知识为首要目的转变为关注人的发展,积极倡导自主、合作、探究的学习方式,努力建构开放而有活力的教学环境,给学生提供充分发展的空间。那么,如何把课堂的时间和空间还给学生,让学生成为学习的主人?如何保证课堂时间的高效、合理,让学生的思维在老师的激发中飞扬?让学生在探究中学有所 The New Mathematics Curriculum Standard states that mathematics teaching should be changed from acquiring knowledge as the primary purpose to paying attention to the development of people, actively advocating learning methods of independence, cooperation, and inquiry, striving to construct an open and dynamic teaching environment, and providing students with full development. Space. Then, how to return the time and space of the class to the students so that the students become the masters of the study? How to ensure that the class time is efficient and reasonable. Let the student’s thinking fly in the teacher’s motivation? Allow students to explore the middle school