I looked at teachers pay teachers website and found no ethical dilemma. Teacher’s original work is being sold to members of the website for a certain price, which is legal in this country. This phenomenon is no different then an author of a book selling their work via the web as a form of e-books. There seems to be no ethical dilemma because teachers can do as they like regarding their original work. They can distribute it for free or for a fee to the public, which is perfectly fine in a free and capitalistic nation. I would even go as far as to encourage other teachers to participate in this web site so there is a collaborative effort to better the education system with different sets of ideas from many different participants.