Replying to Anoying teachers at school

at my boarding school my teachers always come in during study hall between 730 and 930 to make sure we are doing work, so i finish my work at 9 or earlier than 930 always, and being to watch a video or play a game, so obviously they come in and check on me and ask me what im doing and get all pissed off that im not doing work, so i tell them, im all done with my work, and they respond "go read a book", i hate to break it to them, but on my few free minutes i get at the damn school, im not gona read a fucking book, just thought i would share some of my feelings about this topic