If you have more than one Web page, you must give some consideration to site design -- how the individual pages of your site are related to one another.
It's often helpful to think of your site as being divided into several subsites. For example, you may have a collection of pages relating to each of the courses that you teach. Each of these collections may be considered a subsite.
There are certain conventions which you should observe for each site (or subsite). For example, it's standard practice to have a "home" or "main" page for the site. All pages within the site should link back to this main page so that users don't get lost. The home page should provide the best possible starting point for accessing the information in the site.