Mama Bear V. Public School System

I used to believe in the public school system until recently. My oldest daughter has been tortured and bullied since starting in the public school system. She started in Kindergarten and had problems being picked on, which I know that is normal behavior for the age group. Then this year it has escalated to physical violence towards her. She has had her clothing ripped and pulled on by boys and the teacher didn't do anything to them. She has had a boy put his hand over her mouth to keep her from telling the teacher. And rocks have been thrown at her to where she received a busted lip and NO PHONE CALL ON ANY OF THESE from the school. How can you believe in a system that protects the bullies and not the one on the receiving end. I mean at elementary age the teachers are responsible for their health and well being and that includes physical and MENTAL health. AnnaLisa has been so traumatized by all of this that she is BEGGING me to home school her like her little sister that is 4.
Her teacher said that it looks like she has ADHD and we had her tested and talked to the testing therapist and she said it could be that but it is more the bullying that is causing it. She is suffering from depression due to all the torture that is happening at the school. I have been to the school almost on a daily basis to talk to the staff and there is never any resolution to the issue of the bullying. Every time something happens AnnaLisa is the one that has to stay close to the teacher instead of the student(s) that are inflicting the bullying on her. To me this is the wrong way to go about it. It should be the student that is the aggressor is the one close to the teacher. This makes my baby more of a target and she continues to get harassed by these boys.
Since the school is not doing anything to help the situation I have had to contact the School board and notify them. So far it has done nothing to resolve my daughter's strife at that horrible school. The kicker to that is my husband didn't want me to go to the school board since it would make them( the school board) take notice of the situation at the school and what they are NOT doing to protect these children. Since I talked to the school board they sent an incident report home about a boy grabbing her by the arm and leaving a mark and the scraps on her arm. I had to ask AnnaLisa what happened and she told me and we still didn't receive a phone call from the school about the incident and this was last week that this one happened. I am at my wits end with this school. I have started to enroll both girls to a charter school so they can be safe since the public school system is failing horribly in this area. The only issue is that my husband is against it even though our oldest has been through all of this for them to go to the charter school.
All I know is that I need to protect my child from these boys that keep hurting her and get her confidence back up. Since she has been in the public school system I have seen her decline socially and emotionally. She used to be so outgoing and wanted to be everyone's friend and now she is so scared to get close to anyone for fear of them attacking her verbally and physically from her experience in the public school system.
I just hope that I can convince her father that the charter school is the better option for both girls for there all around health and well being.