Use of Wikipedia for Classes

Where the heck have I been for the past year? I knew about wikipedia, but I had no idea that faculty were assigning readings from it or actually having students make contributions to it as part of a class assignment. Good grief. I was still way back thinking about whether or not they could cite it for a paper. Obviously faculty and students are way ahead of me on this one. There is even an an article in wikipedia about using wikipedia for class assignments.