She’s an elected official. Imagine if governments could just expel any elected officials they didn’t agree with. What she did is fucked, and the girl should absolutely sue. But I doubt the board of education has the power to just kick her out entirely. They pulled her out of her special committees (where a lot of policy is written before it reaches a general vote,) and barred her from attending non-essential meetings. What else do you realistically expect them to do? The board did what they could to hamstring her and prevent her from pushing actual policy.