A Note About Hyperlinks:
problem that we cannot help you with is "link rot."
As you are probably aware, links on the Internet become useless at
an alarming rate. One study that monitored educational sites for a little
over 6 months found that nearly one fifth of the Web sites that were
linked disappeared. The dot-com sites had the highest attrition rates
(40%), followed by ".edu" sites (18%) and ".org" (15%).
We emphasize ".gov" sites on the assumption that the information
there may be more reliable and that the sites may be more likely to
survive and be maintained. Even in such a case, many Web-site managers
have an unfortunate tendency to re-organize (and re-address) their Web
pages. If a site that appears to be dead is critical for your purposes, it
can pay to contact the Web-master (they usually put a link to themselves
on the home page of the site).
1. As an extension activity, you may have students create Web-based tutorials on a given subject. This website publishes outstanding student contributions: http://www.thinkquest.org/tqic/index.shtml