What to do about high school?

Don't look down on them because they act silly...by giving a comment like this ''I usually go by the fact that I will never see them after I finish school, and they will most likely be in low paid jobs, with about 5 kids.''That doesn't make you better than them.I'll tell you what i do.I just try to be more confident than they expect...and that makes them feel silly ;)So if the giggle and make you turn red while you are talking turn the shame into confidence and you'll see them being amazed at you!