Maintaining your Internet-based lectures is the third key phase of Internet-based teaching. Changing a lecture from year to year is a common feature of teaching in any format. Science changes. New examples come forward. One of the circumstances of the Internet, though, is that hypertext links become non-functional (dead), or that whole web pages change in content and/or scope. If you are seeking to maintain an internet-based lecture over time, then, you will need to spend some time to keep it up-to-d ate and fully Internet functional.