新课改下教学理念的转变改变了学生的学习方式,使学生由被动学习变为主动学习。建构主义学习理论认为:“学习过程不是学习者被动地接受知识和由外向内的传递过程,而是积极地、主动地建构知识和经验的过程。”预习就是一个很好的知识建构的过程。陶行知说:“预习是自求了解的重要步骤。”通过预习使学生学习目的明确、态度积极、注意力集中、听课针对性更强,可以更大程度地提高课堂学习效率。 Changes in the teaching concept under the new curriculum reform changed the way students learn, so that students from passive learning to active learning. Constructivism theory suggests that learning process is not a process in which learners passively accept knowledge and transfer from outside to inside, but actively and actively construct knowledge and experience. “” Preparing is a good knowledge building process. Tao Xingzhi said: “The pre-study is an important step for self-understanding.” "By pre-learning enables students to learn clearly, with a positive attitude, focused attention and more pertinence, which can improve classroom learning efficiency to a greater extent.