sorry to hear about your phone....If my Iphone was stolen during class i would personally make sure no one leaves the class room untill i get my phone back and after i did get it back i would probably be suspended for fighting or if the girl that means the world to me e tried to get hold of me but couldnt when she really needed me (quite often) i would probably be taken to jail for my actions ESPECIALLY if she did any harm to herself because she couldnt get hold of me......guess what im trying to say is that i have an idea of what your going through and hope you get it back....but if you have icloud and are signed it then sign in here and you can either wipe it out, lock it with a password, and even locate where it is with find my iphone https://www.icloud.com/