《义务教育数学课程标准》指出:有效的数学学习活动不能单纯地依赖模仿与记忆,动手实践、自主探索与合作交流是学生学习数学的重要方式。也就是说,在小学数学教学中,教师可以借助先学后教模式,充分发挥学生的主动性,要给学生搭建自主展示的空间,以确保少教多学课堂的顺利实现。 “Compulsory education mathematics curriculum standards” pointed out: Effective mathematics learning activities can not simply rely on imitation and memory, hands-on practice, independent exploration and cooperation and exchange is an important way for students to learn mathematics. In other words, in primary school mathematics teaching, teachers can make use of the mode of “first class and second class” to give full play to students’ initiative and give students the space to display their own autonomy so as to ensure the smooth realization of less-taught and multi-class classroom.