The online tutorial I would have for the library is about the Underground Railroad. National Geographic has a good site for this. There is a part of it where you make choices about escaping and you find out if you're further on the road to freedom or if you've been captured. The National Park Service has a lot of info too. On the library info site there would be maps of the routes the slaves took, the quilts that were used as signals, the songs with hidden messages and oral histories. There would be lots of pictures of people and houses on the routes and a forum where people could add their family stories. One section would list tours to the sights around the country. Teenagers and kids from the library would make utube videos telling about this time in history.