Do you allow your students to use Wikipedia as a source for research? It isn't exactly a highly credible source and anyone can make "corrections" to entries which causes more than just a few problems. I know they're supposedly making it tougher to do that, but I just checked some random topics and found all kinds of errors and mistakes. And, I know a lot of people will grade a paper down if Wikipedia is used as a source - and that includes me. What about you?