A group of high school seniors in Brampton probably won't be getting the keys to mom & dad's car for awhile.

9 students at St. Marguerite D'Youville were told to stay home Wednesday after getting caught trash tweeting 3 of their teachers.

The victims are 2 women & 1 man.

Board spokesman Bruce Campbell says the content of the tweets was "inappropriate, some of it was sexual in nature" & he characterizes at least 1 tweet as aggressive toward 1 teacher in particular.

Peel Police were called in too.  No charges were laid but Campbell says the students involved were "cautioned" by officers with their parents in the room.

The teen boys & girls involved say they're sorry.  Their punishments will be determined by the school, likely on Thursday.

The twitter smear comes in the middle of Ontario Bullying Prevention & Awareness Week (Nov 18-24).  The timing isn't lost on Campbell.

He hopes students learn that they have a responsibility when using social media.  Campbell says whether in class or out, there's no free pass for what boils down to cyber bullying.