Besides disciplining her, it's important to teach her better ways of dealing with her anger/frustration. Helping her to learn words to verbalize what she is feeling, teaching her to recognize when she is getting upset & then to remove herself from the situation by leaving the room, asking to use the bathroom, moving to the other side of the room etc. Maybe teaching her something nonharmful that she can do to decrease her frustration level &/or give cues to the teacher & family that she is close to losing it? Like, I don't know... twirling her hair or rubbing her arm or cheek for example? Obviously it's harder to reinforce good behaviors while she is at school, but hopefully if you share with the teacher what you are doing to help her & the rationale for it, she will be supportive & help the girl. Teachers are very busy, but I'm sure she wants the biting to stop as well!
A few visits with a social worker/counselor (does the school have one?) might be good. They could help your daughter let you know if there is something in particular that is increasing her anger/frustration level, & give you more suggestions on how to help her modify her behavior. She is too old to be biting; that is usually a behavior of toddlers in my experience.
Finally, perhaps getting her more physically active would help her to work out some of her frustration in a healthy way? Any physical activity/sport would probably be good. Tae Kwon Do, for example, helps teach respect & self-control.