Can use discussion boards. Using CGI scripts, you can have students do exercises or quizzes online. Allows students to direct their own search. Save copies of the important files onto a disk, just as a backup. Doesn't handle audio easily, and barely handles video at all.
Web is good for searching, bad for reading.
Have to browse through piles of junk to get to anything valuable. See a short list of what you can and can't get on the Web. Using a password-protected system can alleviate many of these problems. As for using the Web in a classroom, it is even more confusing to watch someone else jumping from page to page. Lack of structure means that WWW or any hypertext system is difficult for rank beginners, who need the support of a linear or hierarchical presentation.