How can you teach children in a moral vacuum? You can't. Trying to teach children in a moral vacuum is still teaching morality, only, it teaches them that reading and writing and math is more important that morality which they are not.
But that is not what is happening now, what is happening now is that schools have adopted a new moral religion of the Left that tells children what is woke is moral and what is not is evil, and because they don't mention the "G" word, all is well.
This reminds me of a public school in Ohio where a girl was raped in study hall. When the parent found out about it he ran to the school demanding answers, and the first thing out of the schools mouth was not to alert the media and that they would handle everything. Then I will never forget the response of the teacher who was suppose to supervise the children in study hall. She said it was not her job to teach the children morality.
And that is why we are at where we are at.