《国家数学课程标准(试用)》指出:“自主探索和合作交流是学生学习数学的重要方式。数学教学应该帮助学生在自主探索的过程中真正理解基本数学知识与技能、数学思想和方法。”这就要求教师“把课堂还给学生”,在课堂上让学生有充足自主学习的时间,为学生多创造自主学习的机会。 The National Mathematics Curriculum Standard (Trial) states: “Self-exploration and cooperation and exchange are important ways for students to learn mathematics, and mathematics teaching should help students to truly understand basic math knowledge and skills, mathematical ideas and methods in their own exploration.” This requires teachers to “return the class to the students”, in the class so that students have sufficient time to learn, and create more opportunities for students to learn independently.