俗话说,巧妇难为无米之炊,在我眼中这“米”就是为学生提供有价值的“学习素材”。建构主义心理学认为:学习活动的产生与学习素材具有密切的关系,为学生提供积极参与、主动探究、合作交流的学习素材,有利于学生知识的理解和全面素质的发展。在新一轮课程改革中,小学数学教材提供的学习素材弹性较大,可支配因素多,内容的呈现更具综合性,这就给学生提供了广阔的学习素材, As the saying goes, the trickery is no straw, in my eyes this “rice” is to provide students with valuable “learning material ”. Constructivist psychology holds the view that there is a close relationship between the generation of learning activities and the learning materials and the provision of learning materials for students to actively participate, take the initiative to explore and cooperate with each other, which is conducive to the students’ understanding of knowledge and the overall quality development. In the new round of curriculum reform, primary school mathematics textbooks provide more flexibility in the learning materials, more controllable factors, the content presented more comprehensive, which gives students a broad learning materials,