Some LMSes such as Canvas and Moodle allow instructors to upload the course content in form of pages. These files are displayed as hyperlinks, like the Moodle page shown in Figure 2, or are regarded as attachments to the pages. Compared to the file system approach, this method enables instructors to describe the contents of the materials and explain the relationship between the topics more clearly through the webpages. However, for instructors who have already written their course materials in other formats, they may need to convert the materials into digital form, which could be time-consuming.