How to spend money on an Amnesty International Group?

So i was awarded the jack petchey prize for acheivement mainly for my work leading the Amnesty youth group at my school. My teacher said it would be nice if I used the money for the Amnesty group. However, the money can't go to Amnesty International itself as a donation, the money has to go towards the school community. How can I use �200 to raise awareness for human rights and/or do some effective campaigning? I had ideas of getting a speaker into school, but I haven't really got many other ideas. Help?