I would choose to view this as a supportive e-mail.
If I were the VP of a school and sent an email like this to a parent who had sent me an e-mail like yours, this response would mean "I've told the teachers they need to knock this nonsense off and get on board actually teaching your child, so I don't expect you will have any trouble getting them to agree to the needed changes...but if they don't, I have your back: Principal and I will help you help them see the light, and you can tell them that."
