This link leads to a PDF file for a WebQuest. The thing that I really like about this is that it leaves it up to the students to do research on the subject that they are learning about. Each student gets the opportunity to choose an explorer to do research on. They do the research, based on a guide given to them by the teacher, and they learn about that explorer. The next portion of a project like this would be for the students to teach each other about the explorer they learned about. So for example, if five students chose to do research on Columbus, you could put all of those students together to come up with a presentation for the whole class on that explorer. I like this idea because I think that if students know that they are going to be teaching this material to other students they will be more likely to learn as much as possible on that explorer and will in turn learn more efficiently.