PLEASE HELP! CRAZY OLD TEACHER?!?!!?

ok i know its long but plz help... my teacher is crazy old and mean!!! shes our homeroom teacher/ history teacher. okay so shes like 65.and lives alone with her cats. half the time shes rly nice put all the sudden she just snaps and goes all crazy. shes really mean to me and my friends. ok so she makes us collect the attendance for the whole school (im in middle school) which takes a while and she always yells at me if im like 1 minute late and always says shes gonna give a detention to me but never does. okay it gets a lot worse... one day me and my friends and this other girl were walking and the bell just rung. we were like right at the door and slams it in our face!! after a minute the Spanish teacher comes out and says y aren't u in ur clroom? and our homeroom teacher goes y are they late?! and she goes they were walking to cl right when the bell rang and shes like ya ok with sarcasm. then shes like hurry up girls ur holding up the cl! when we get to the gym u r all going to be seperated! (we were helping se up for the 8th grade graduation) *in the gym. and other girl with us is crying* (scared she'll get it trouble for some. reason ) the teacher goes says there's no reason to be crying! and.says right in front of me and my friends that's what u get when u hang out with these type of rude people! another time my friend wasn't sitting up and shes like SIT. UP. then shes like no actually u can stand up! then my other friend left her book on the desk and shes like who's is this?!!! and shes like mine. then shes like come up here and I wanna see u write ur name in it now!! u don't need to perform for the cl! and shes like my names already im it. and she like WRITE. IT. then another time everyone was at their seat and shes like were not leaving till everyone's at their seat! which we all were!! so we were there for like 10 minutes