课堂练习是学生学习最基本的活动形式、概念的形成、知识的掌握、学习方法和技能的获得,学生智力的发展和创新意识的培养都离不开课堂练习这一基本活动。新课程背景下的数学教学,特别重视数学练习设计,认为科学有效设计数学练习,是提高学生学习效率的 Classroom practice is the most basic form of activity for students to learn. The formation of concepts, the mastery of knowledge, the acquisition of learning methods and skills, the development of students’ intelligence and the cultivation of innovative awareness can not be separated from the basic activities of classroom practice. Under the background of new curriculum mathematics teaching, pay special attention to mathematics practice design, think science effectively design mathematics exercises, is to improve students’ learning efficiency