一、研究背景化学学科课型很多(理论型课、计算型课、有实验的元素化合物型课、实验课、复习课、习题课)。不同课型的预习作业设计方法是不同的,本次先重点研究概念课中预习作业的设计和利用。预习作业设计时主要应考虑的问题:预习什么?怎么预习?什么时候预习?预 First, the research background A large number of chemical courses (theoretical courses, computational courses, experimental elements of compound classes, experimental classes, review classes, exercise class). Different types of pre-course homework design methods are different, the first focus on the concept of pre-lesson homework design and utilization. Pre-operation design should be considered when the main issues: What to prepare? How to prepare? When to preview?