获取课例是研究课例的基础。做文献检索是获取课例的另一途径。获取课例的途径主要有纸质媒体路径,如图书馆、书店、个人藏书等,电子媒体途径,如网站、网校、QQ、微信、博客等电子媒体等。处理文献的方法主要有复印、扫描、抄写、分类、归档等。课例研究文献检索要注意辨识文献的真伪,注意处理过程中的保真,注意与授课老师沟通。 Access to lessons is the foundation of the research lesson. Document retrieval is another way to get lessons. There are mainly paper media paths for accessing lessons, such as libraries, bookstores, personal collections, and electronic media such as websites, online schools, QQ, WeChat, blogs and other electronic media. The main methods of processing documents are copying, scanning, copying, classification, archiving and so on. Case study literature retrieval should pay attention to identify the authenticity of the literature, pay attention to the fidelity in the process, pay attention to communicate with the instructor.