This year I joined my grade's Interact group which has been really inspiring! I would highly recommend that you join the one at your school. If your school doesn't run one then talk to a teacher and start your own interact, social justice or charity club or even see if there is one in your community.
So far this year my group has attended a "Just Leadership" Day run by Caritas, an ERA for Change Seminar (where I got heaps of freebies! Yay!) and run a school bake sale to raise money and awareness for a struggling school. I have been inspired by amazing advocates to make a difference in this world.
It is a really great feeling to know you are helping those in need while at the same time learning and making friends. So go and get involved!
Please comment! :)