Unfortunately, I had a student who - despite repeated warnings - continued to do little or not work and use her phone during class. I had told her that today was a test to determine if she would be able to focus and complete her work. She used her phone a little at the beginning of class (and had to be told twice to put it away) and then went to the bathroom even though we asked her to stay during review of an important problem that she said she had not understood.
At the end of class I told her I was going to call her mother about this and over the course of 15 minutes she transitioned from pleading, to shouting, to crying quietly. In the end I gave in and I'm not sure that was the right call. Despite her crying, I am not convinced that her actions will change. We agreed that Friday would be the test and she would "do her work" correctly from here on.
I only hope she is able to live up to that expectation.
I did not feel comfortable taking a photo of this situation so you will have to imagine it for yourself.