well there is an easy way, ftp access
running a ftp app at school or home, or both,
and access ur data at school from home, via the same ftp app,
olso, but this is more for working on the other pc rather then exchanging files, using the windows built in remote access function,
the ftp is good for 1 or 2 pc's but for a whole school, the bandwidh might be a problem