The cell phone is her only phone, it is not a luxury. Schools require the teachers to be reachable, she has to have some phone. Ditch the cable though, unless it's cable internet and you're using it for job applications. Working after school and grading are incompatable, but she could be working weekends at a second job, most teachers do. Check intrest rates on student lones vs cc debt, it may be possible to switch to a graduated repayment play on the student loans where she makes lower payments now and bigger payments later. Then she could pay off the cc faster. Electric bill seems high, you can get bulk compact flourescent lightbulbs on ebay for less than they usually cost in stores. The energy savings would make it worth it even on 20% interest. Sell the tv. You can buy a better one in six years. Bake bread instead of buying it at the store. Make bean burritos the night before to have for lunch, etc.
That situation really isn't so bad at all, she has a steady job and can pay it off. Bankruptcy would be a terrible idea, that's the worst thing possible for her credit rating and she wouldn't be able to get another loan for anything for seven years afterwards. If she just cancels cable she could pay it off in 5.5 years instead of six. By my math she still has room to pay almost $700/month as long as she's eating frugal, like beans, rice, and eggs. If her employer matches a 401k dollar for dollar, then it is still worthwhile to save, otherwise just pay the cc bill to the max. The faster she pays it off the better a position she'll be in when she tries to get a car loan. At $700 a month it would only take 4.3 years instead of six.