Yes, yes, yes!!
The Fort Worthless ISD board just created serious liability for the ISD and for themselves.
The teacher should sue in federal court for violation of her First Amendment rights. She should sue the ISD and the members of the board jointly and severally. The board is a government agency and cannot fire someone for exercising a constitutional right in a public forum outside of work. She will win and should immediately place liens on the homes of each of the board members that day. She should be able to force the sale of those homes to pay the amounts the board members and the school system owe her.