Moon Trip?

This week I was out of the building and had a sub in. The astronomy students started a webquest about the NASA missions to the Moon in the 1960's. The goal of the assignment was the have the kids form an opinion about the Moon landings and if they actually happened or not. They are to form an arguement on the topic and then produce a document to that effect. Next week I think we are going to have a classroom discussion/debate. The interesting thing was the sub left me a note saying that the kids were all really involved in the research part of the assignment. I can only hope that they will be as interested in the document and discussion part. Any ideas on how to structure this discussion/debate?