A very sad "solution" to a growing problem
First, I'd like to offer prayers to the girl's family, friends and relatives. A lost life so young leaves many unanswered questions. No matter what happened, this horrible event should help create a dialogue between ALL parents and children. This is a teachable moment, and I'm sure the girl's family would NEVER want such a thing to happen to anyone else. The girl would probably want others to know what she went through, but since that has not been released in the news (public eye) we all need to respect the family and their privacy.
Keeping the line of communication open with children does help during times of uncertainty about adjusting to growing up, making new choices and noticing other's differences. The Parent can be the role model....or not. It's up to the parents not the school, but really it could and should be a joint effort to ensure that all students are "protected" from bullying, teasing, or all levels of "psychological abuse" It starts at home, and for the very young, teaching kindness and tolerance and acceptance begins when the child makes their first friend. That often happens in school.
I'm not sure how the public schools handle such treatment of others, and if they provide workshops on cultural differences, peer differences, etc to ease the process of making choices while growing up. I can't imagine teachers just sitting back and watching teasing/bullying occur. I'm sure it's behind closed doors, like other types of abuse. TRUST in telling an adult needs to be reinforced and encouraged. If you think about it, adults can get a restraining order if they need one, what choice does a child have to protect themselves from a bully? If there is one, I'm not aware of any special law or rule.
Our private school has only one class per grade, and the students respect each other and share a love of God. They encourage one another (example school talent show)- no negative comments, just support.It's not a perfect place, but it's a caring place, with a wonderful sense of community and trust. Bullying is not tolerated at our school, and the teachers demonstrate respect.
Children understand that we all have Gifts to share. Outward appearance is not much concern or a burden. We have uniforms and the students are all equal. Sure they can wear stylish hair bands, but there are limits. It helps to not have to "worry" about that stuff. It's a distraction, and learning is most important on an equal level. Of course a student shines without coloring their hair (green etc.) They shine in what is INSIDE, their talents, academics, personality etc).
God bless the family who lost their daughter. She must have really been hurting to see no other way out. Typically, girls will "talk" about it, or show signs, before they "do" it. It's the boys that won't...
Hug your kids...