Fire every last one of them.
Burn them all down.
Most teachers are liberals, as are most librarians. I searched our local library’s website for biographies for children, and every single result was leftist crap. Some of it was alarming, like the book about how the mothers of MLK, James Baldwin, and Malcolm X changed the world. There was a book about “brave Michelle Obama”, several books on kids who are supposedly changing the world, and biographies of various 3rd world kids. Not a single book about any of the founding fathers, any conservatives, or any American heroes of any kind. When I go to the library with my grandkids, the liberal garbage books are always prominently displayed. The US education system is a lost cause.