School's do not teach ideologies because Ideologies are a set of beliefs resistant to contrary fact.

Homosexuality being normal and valid is not an ideology, it's accepted scientific truth. Being against it is an ideology.

You are saying "countless ideological worldviews" are being taught, but I'm struggling to come up with even one, and my wife is a teacher

So, what is a view you personally do hold, to defend your viewpoint so firmly?