预学单是指教师为帮助学生掌握教材内容,指导学生进行知识建构,依据学生的认知水平和知识经验而编制的预习作业。它不仅可以提升学生的自学能力,而且可以为教师的教学提供精准的信息和依据,减少不必要的讲授和无意义的指导。编制适宜的预学单,已成为课堂教学的第一环节,它关系到课堂教学的针对性和实效性,它是沟通“学”与“教”的桥梁。那么,该如何设计和运用预学单呢?一、有的放矢——以内容为基点预学单应是下一个课时内容的导航针,它是为新课作预 Pre-primary single refers to the teacher to help students master the content of teaching materials, guiding students to construct knowledge, based on the level of cognitive knowledge and knowledge prepared by the preparatory work. It can not only improve students ’self-learning ability, but also provide accurate information and basis for teachers’ teaching, reduce unnecessary teaching and meaningless guidance. The preparation of a suitable pre-study list has become the first step in classroom teaching. It relates to the relevance and effectiveness of classroom teaching. It is a bridge between communication, learning and teaching. So, how to design and use of the pre-study single? A targeted - based on the content of the pre-study should be the next class content navigation needle, it is for the new class of pre-