I've nannied two girls ages 4 and 7 for almost a year now. At first they were great then began throwing more tantrums, but nothing too crazy. But in the past couple months the 7 year old has started biting me, throwing things at me, scratching me, punching me, basically attacking me in anyway possible. She's also threatened me saying things like "I wish you were dead" or "I'm gonna torture you until you start crying" or "I'm gonna kill you". I don't know how many times things like these have happened but it's been two consecutive days this week (and I only watch them for about 3 hours a day) and has happened many other times before in the past few months. The attacks usually last for about 30 minutes and only stop because her mom gets home or I finally get her to go in time out. I've tried everything from telling her I'd take away TV to implementing a reward system for when she's good. Nothing works. Today I left with scratches on my face and arms and I've had bruises from her biting me for a while. I know the parents are probably trying but nothing is working and she keeps doing this. Should I put in a notice now or wait a little bit longer? Or is this even worth quitting over?