>> reporter: carla gamboa wanted you to see that. she's a school bus driver herself. and after she complained to the west contra costa county district again the bullying stopped for a while. then came the beating on march 25th. she confronted the prince pal. >> i said now what are you going to do? i told you last time, i wanted to avoid something like this from happening. it was just a matter of time. and he said i don't know. i can't tell you what i'm going to do. and i said are you serious? >> reporter: she kept her daughter home for two weeks. the school never checked on her daughter or provided makeup work. >> she started beating her back, pulling her hair and stuff. >> reporter: with their parents' per miss, we spo permission, we spoke with students who were there for the attack. >> why would you fight her? >> she was trying to avoid the fight. but she got beat up pretty bad. >> reporter: the teacher would not come out and discuss what happened. i waited for hours, and they left without my seeing them. i returned the next day to see the principal's parking place

carla gamboa tells me she first complained to the school five months ago about her daughter being bulliedescribing the teasing about valeria's height, her hair, her friends and even during class. >> i couldn't focus and i want to learn and not just hear her about me and saying stuff in the mom started keeping a list of alleged incidents and says the pressure on valeria escalated when other students sang an obscene track posted on instagram. >> she's a ho, ho, ho, ho. >> carla gamboa uponed you to see that. she's a school bus driver herself and carla tells me after she complained to the west contra county unified school district again the bullying stopped for a while and the classroom beating on the 25th and she confronted principal peter aloo. i said now what are you going to do? i told you last time i wanted to avoid something like this to happen and it was just a matter of time. he goes, i don't know. i can't tell you what i'm going to do. i was, like, are you serious? carla kept valeria home for two weeks and she told me the school never called to check on her daughter or to provide ma

. >> carla gamboa told me she first complained to the school five months ago about her daughter being bullied discussing the teasing about valeria's height, her hair, her friends and even during class. >> want to focus and i want to learn and not always hear her talking about me and saying stuff. >> the mom started keeping a list of alleged incidents and says the pressure on valeria escalated when the other students sang an obscene track posted on instagram. >> she's a ho, ho, ho, ho. >> carla gamboa wanted you to see that. she's a school bus driver herself and carla tells me after she complained to the west contra county unified school district again, the bullying stopped for a while and then came the classroom beating on march 25th and she confronted principal peter aloo. >> i said okay, now what are you going to do? i told you last time that i wanted avoid something like this to happen and it was just a matter of time. he goes, i don't know. i can't tell you what i'm going to do, and i was, like, are you serious? >> carla kept valeria home for two weeks and the school never called

. >> reporter: carla gamboa says she first complained to the

. >> carla gamboa first complained about her daughter being bullied, discussing the teasing about her height, her friends and even during class. >> i couldn't focus and i want to learn and not just hear her always talking about me and saying stuff. >> the mom started keeping a list of alleged incidents the other students posted a track. >> she's a ho, ho, ho, ho. >> she's a school bus driver herself and carla tells me after she complained to the west contra costa unified school district again, the bullying stopped for a while and then came the classroom beating on march 25th and she confronted principal peter aloo. >> i said now what are you going to do? i told you last time that i wanted to avoid this to happen and it was just a matter of time. he said i don't know, i can't tell you what i'm going to do. i was, like, are you serious? carla kept valoria home for two weeks and the school never called to check on her daughter or to provide make-up work so i went to the school this week. >> she started beating her and pulling her hair and stuff. >> and with their parent's permission spok