Welcome
As you've already got some experience with AS, I hope you forgive me if I mention anything you already know. Perhaps sharing examples of these behaviours can help us better understand your situation.
In the meantime, it might be beneficial to actually sit down, in a quiet room, from time to time, and talk to her about why she is being disruptive. Often people with AS can display frustration, but never really share with anyone as to what the cause of their frustration is. It's not necessarily that she may not want to share, but many Aspies don't consider it an option. By asking her, you can prompt her to share what's bothering her, which can assist you with understanding the root causes of her stress.
It can also be helpful to her if you speak in a clear, and literal manner, as people with AS may takes things literally. Be sure to phrase questions in a way that they address precisely what you want to know, as opposed to a vague, or open ended question. It will take patience, and understanding, but hopefully it can help the two of you communicate better.
If you'd like a really good guide to understanding AS for women, this is a really easy-to-read, and relevant book, which can better help you (and perhaps herself) to understand AS a bit better. It contains advice for women with AS, as well as advice for how parents (or in this case, teachers) should react to certain behaviours, so I highly recommend it:
Aspergirls: Empowering Females With Asperger Syndrome | AspiesCentral.com
I hope that helps. Let us know how you go.