How do i stop a adinistrator from, in realtime, remotly viewing my comp. scren n den shutting me dwn in school?

Basicly in the school library the librarian has the ability to remotly view everyones computer screen and shut them down if we are playing games and such. i ******* hate this. i have goddamn campus and no work to do, i just wanna relax a little and the one librarian dosnt even care, but this other on has somthing shoved so far up her *** that google earth flight simulator is off limits. i hate her, please help me. What can i download? or what should i do.