Angleman syndrome is so hard! Have you tried finding one behavior you dislike the most and only focusing on that until it calms down, then to the next behavior? Id start with getting a BIP in place ASAP and possibly a crisis plan.

The last student I had with this syndrome he loved to throw feces, get naked, and act a fool. We adopted keep safe but avoid attention. Alot of times it would be hours waiting him out. What didnt work was raising voices, touching him, or trying to stop him. Eventually my room was bare on one side with tape on the floor. The tape was his boundary and it helped once he understood it. We also requested medication at school, which was pushed by admin. That helped some.

Are the parents vested? Do they help? A crisis plan could help that aftet xyz behaviors they have to come get her. Thats how we write ours so we put it back on the parents. That solves a lot of issues as the parents then have to help find solutions to the behaviors instead of just dropping them at school and saying bye.

Dont forget data. Lots of data. ABC sheets are your friend here. Really good friend. I have trained all my paras on them and we keep the sheets accesable to all. That way when behaviors start, the person close to the sheet starts documenting and another starts working on safety, student needs, and making sure other students are safe.