[header] How to school proof your facebook account [title] Quit bad habits. [step] It may be fun to swear and badmouth others on facebook, but if you are adding a teacher, you need to get rid of this behaviour right away. You want to appear as a mature, young adult, to impress your teacher and make him/her see that you aren't rude or abusive. 
[title] Go through the contents of your wall for about the past week or so. [step] Remove any bad wall posts, comments, and statuses.