兰本达教授对材料有一段论述:材料的种类和组合以及交给孩子们的次序就是材料的结构。所谓结构严密,指的是各个材料之间、材料与教学内容和教学目标之间具有紧密联系,因此,具有这样功能的材料叫做具有严密结构的材料,简称“有结构的材料”。有结构的材料有利于集中学生的注意力,激发学习兴趣,提高学生学习的自觉性和积极性,激励学生主动探索、锲而不舍的求知欲望; Professor Lan Benda discusses the material for a while: the type and composition of materials and the order they are given to children is the structure of the material. The so-called structured, refers to the various materials, materials and teaching content and teaching objectives are closely linked, therefore, has such a function of the material is called a tight structure of the material, referred to as “structured material ”. Structured materials help to concentrate students ’attention, stimulate their interest in learning, improve students’ awareness and enthusiasm for learning, motivate students to take the initiative to explore and persevere in their desire for knowledge;