I just recently set-up a science project using the lession activity. The project is setup into 5 Stages with each stage separated by a question page. I have set the question page up as a password entry which the students have to get from me to progress to the next stage of the project. Each stage has all the documents and information sources they require for that stage.
This has generated a little bit of mystery into this project. The students seem quite eager to get the work done so they can get the password and see the next stage.