use your size non agresivly, stay carm and think clearly,
if their is no one you can call for help!
i,e, teachers,securaty or freinds,
have a quick look around and plan an ascape because some times ther may be more then 1 person that wants to fight you.
if some one does get to close, yous your elbows and knees to escape and cover
use kicks to keep them away.
fighting in schools is not the place and shouldn't hapen.
if you want to fight join a local club and do it profeshionally.