Funnybone, I’m so happy that someone finally said what I was screaming at my screen as I was scrolling down the posts. In my experience, kids won’t act out with teachers that they truly feel love them and care about them. IKNO, you clearly do care about her, but might need to show it to her in ways that you don’t need to with other kids. A mentor of mine once said that the best medicine for a child starved of attention – is attention.
Perhaps invite her to your house for Shabbos. Maybe a Thursday night to bake challah. If those aren’t shayach, maybe take her for coffee or ice cream after school.
For many teachers, money is an issue. You might want to meet with her parents and share your care and concern for her with them. Show them your commitment to her growth and wellbeing (which you’ve clearly demonstrated throughout this stream). You’re not “busting” her by going to her parents – you’re strategizing and partnering with them. My hunch is that your description of her behavior won’t be a surprise to them, and they will embrace your reaching out to them and gladly offer to “help” you in any way they can – which might mean paying you or at least reimbursing you for your additional expenses. (NOTE: Before I get jumped on for saying that. I’m not claiming you should demand extra pay for helping her. You clearly are a dedicate and lishma teacher. I just know from experience with teachers that money is often an issue for them that prevents them from doing some of these things and parents will very often GLADLY help in this way when they find a teacher that is willing to go the extra mile for their child.)