Do teachers have a right to question students about the content of a note she caught them ping?

Unfortunately you can't invade their privacy,just keep your eyes open and let the girls know it's safe to come to you if they need to.As for the cutter in your cl it is your responsibility to notify child protective services.I am a parent of previous cutter.Without the counseling she needed to quit I fear she would have done serious damage.I was very upset at the time thinking the teacher had no right to call CPS in my case but looking back I know she did the right thing.I hope you do also.