I had braces through pretty much all of high school, and once I got them and bit into foods and started getting it stuck in my braces I figured out very quickly that I had to break bites off instead of biting into foods. To this day (even though I haven't had braces in almost 25 years), I rarely bite into pizza or sandwiches, etc - I still rip bites off. I still cut my corn off the cob and almost never eat whole apples. She may want to amend how she eats some things - or maybe you can send a fork to help cut things up? I'm guessing even a plastic knife is not allowed, but if it is that might be a good option too. I never did brush my teeth at school.