Take information from websites like:
[url removed, login to view]
or [url removed, login to view]
and design it in an interactive way. For example, if you want to do a course on how to create online safe passwords you can use some of the password strength check tools that gives you information of how strong your password is, how to make it stronger, how much does it take to break etc. So you give loads of advice on online passwords using interactive material. At the end you can ask the user to take a quick quiz and then you can offer him an online certificate that he can print to confirm that he has completed the course.