Wikipedia
One of the more controversial sites on the internet is Wikipedia. The free online encyclopedia has created a division between students and educators, and professors and purists. Much of the information found on this site is subject to interpretation. With the ability of almost anyone to add or subtract to its contents, not all of its information is correct. On the other hand, it is a great information source.
Unlike other encyclopedias, Wikipedia has some information on almost every subject. The same thing that is its weakness is also its greatness. Experts in every field have added to its contents providing a wealth of information. Some claim that this makes it unreliable, but it also can make it current and relevant. Myself, I like Wikipedia and use it on a regular basis.