I have been reading a book by Clay Shirky called "Here comes Everybody". He talks about how Social Media have changed our lives and how it keeps on changing. He started telling about the beginning of Wikipedia and how it evolved from Nupedia.
As he was telling the story a thought came to me about school. We could make an encyclopedia on our wiki for the students to add information on. When students complete a report they can add the information to the wiki. When the next year's students start on their report, they can gather information from the school wiki and then add information the found that was not there. They will be required to come up with at least three sources for their report. One could be the wiki, but they would need to find other information to add to the wiki, or find information that will dispute what was already there.
This could be an ever changing and building source. We could use it for all reports we do. We would add more people each year and more information each year. we would have our very own elementary Online Encyclopedia.