Get a lawyer to draft a letter. Less likely to be ignored. Not shilling for lawyers, just know how the bureaucracy works. Put something official in front of the school administrators faces. Keep in mind that good teachers hate the bad ones. Just like good police know bad police make them all look bad. Often, the principle's need more than a phone call or parental complaint to dismiss a teacher. Unions can be a problem UNLESS there's something real and tangible like a lawyer threatening a lawsuit. Possibly other parents have complained about this teacher(s) and a serious legal notice can give the principle the ammo needed to send the teacher packing.
Get a lawyer to draft a letter. Less likely to be ignored. Not shilling for lawyers, just know how the bureaucracy works. Put something official in front of the school administrators faces. Keep in mind that good teachers hate the bad ones. Just like good police know bad police make them all look bad. Often, the principle's need more than a phone call or parental complaint to dismiss a teacher. Unions can be a problem UNLESS there's something real and tangible like a lawyer threatening a lawsuit. Possibly other parents have complained about this teacher(s) and a serious legal notice can give the principle the ammo needed to send the teacher packing.