FlexWindow -- Here is yet another simple way to add content to the web. This requires setting up an initial web page and then updating by sending email. Take a look at the sample I set up at http://www.udel.edu/sine/test/flextest.html
I'd envision this as a homework assignment page. In high school or middle school, you could even have one of these for each class and email the appropriate one to update it.
Of course, you could also link any of the pages to your main page.