I found this humorous:
http://www.usatoday.com/news/education/ ... -ads_N.htm
A high school calculus teacher has apparently grown sick of paying for supplies out of his own pocket and now sells advertising space on his quizzes, chapter exams, and final exams to local businesses. Some parents have underwritten his sponsorship, too, but I think this is simply proof that teachers often get the raw end of the stick. Hell, I sure wouldn't want to be one!