Networking to my school (Wirelessly)

Ok, Here goes!
I'm new here!! Awesome site!

Ok, I'm in Year 10, our school has a full on laptop program, but our wireless is really restricted.
Let's say, No email, games, bebo anything!!

I live about 0.28km away from the last point of our school (Thanks Google Earth!!) And i would like to distribute my Wireless internet over their for me, my brother and 1 of my friends.

Now, Point to Point is not available to me, the obvious reason the school wouldn't allow it haha. I can see parts of the school from my house (Huge school), but there are tree's in the road (No buildings, hills etc).

As I said, the schools huge, so, what would I be able to do?
Considering we have a laptop program, would having one person on a laptop, sharing the connection via Peer to Peer available??

Please, any suggestions!!