Call other parents that you know and ask them if their kids got the same questionnaire.....
Hello?
Do you really think that a teacher about to be sued blind (I would) or her school are about to give you the names and phone numbers of other parents?
Invasion of privacy...
Abuse of authority.
Child abuse.
Political indoctrination without parent permission.
Individually sue:
The School District.
The school principal.
The idiot teacher.
Punitive damages.