If its an experiment you need to do then you should build some balsa gliders, and figure out how the distance they can glide changes as you move the CG fore and aft. Then discuss why it changes.
If it's a just a paper research report, the possibilities are endless. It depends on what you're interested in.
Don't worry... If I'm on internet at work... then I figure it's OK for you to be on internet at school
Tom